What is the best HEAVY METAL speaker?

Not a bad choice, you could do worse...

Golden Ear Triton 1 is IMO an excellent metal speaker. Great mid and lower bass. Not fatiguing at all and fast enough to keep up. Robust sounding. Even though fairly efficient you will want an amp with some balls for metal. I played a lot of Opeth, Megadeth, Soilent Green, etc. and even more poorly recorded metal like Pig Destroyer sounded pretty damn good. Unfortunately I need to move in a much smaller room that is not suited to them 9x13 so I sold them. I bought some Merlin TSM Mmm and they are awesome metal speakers as well in the right room from 50 hz up. I have owned some others that while ok with rock did not do metal well. Those being KEF 201/2, Dynaudio Focus 140, paradigm s4 and s2, Usher BE718, and some others I can't remember.

mofojo 

Yeah I have looked into Golden Ear's Triton series of speakers too, not bad, but the specs look like they are made for home theater.  Better version of Definitive Audio stuff.  
  
So I have up graded some of my hardware the last few years and still looking for a speaker that is high quality that is less than $10,000.  Upgrades are as follows:

Krell 4k UHD Foundation preamp.  (Makes CDs sound sooooo much better and my Blu-ray concerts never sounded better).  Does a great job with Analog stuff too.  Really happy with this preamp, does just about everything really well. 

Parasound A21 amplifier to deliver some good power

Re-caped my Bel Canto Evo2 amps

VPI Scout turntable with AT150sa cart


However, speakers have been difficult to nail down, been through Klipsch RF-7 II, JBL LSR and studio 590, Energy Veritas 2.4I, and Cerwin Vega XLS-215.  Surprisingly the Cerwin Vega XLS-215 have been the winner but like most on here I am always looking to take things to the next level.  Might upgrade the crossovers in the Vegas' to see if I can get better sound, they are made of cheap parts.  I have been doing a lot of research lately in creating my own speakers with quality parts to meet my musical tastes.  Since most speaker manufactures are aimed at customers that want smaller speakers and the look of an art piece, I figured I would have to step up and build them myself.   I am very surprised in my research that I haven't found someone else in this pursuit of the perfect heavy metal, classic rock speaker and has created their own.  There are a lot of great speakers out there for sale in the $80,000 price level that would be what I am looking for, but unless I win the lotto those prices will be always out of reach for a working class guy like me.  So I am off to beg, barrow, and steal a great design to do it myself.     

   

Cornwall III .......

I'm your huckleberry.  I listen to a fair amount of metal and hard rock.

I've owned Golden Ears - they are OK.  Bass not bad, but I found they lacked that "snap" that a lot of metal fans dig.

Without going through everything I've owned/tried... my short list.  

Ohm Walsh - They can thump, they sound huge, they gobble power.  I'm using some ancient SSC's, actually had the tweeters start smoking (pushed an absurd amount of power through them and they are OLD... they still kept ticking).  I'm going to be demoing newer ones.  I really dig everything about them for the price.  But, set-up is different.  You want the speaker end to be "live", the back end to be a bit more dead.  I'm really looking forward to demoing the newer Ohm's.

Klipsch - Older CF3's/4's (but they are hard to find, and hard to get parts for).  Conversely the KLF 30's (and lots of fun upgrades out there for them ). I have a pair of these on the way I picked up used.  Chorus II's are a damn fine metal speaker.

JBL - If you want to drop some cash - the 4367's do a great job, the M2's and the crown amps can be had for the 11-12k range. DAMN good speakers.  

Tekton - The Double Impacts are pretty darn nice for the cash, dynamic, live sounding.  I've heard the SE's, better, but not sure they are worth the upgrade.  My fear - all those tweeters.

NHT 3.3's - used.  Full range, can thump, can be a bit bright and have a funky set-up.  But a good speaker.

IF you want something more refined.  The DynAudio Contour 60's - can thump, and can play loud without an issue.  That said, the soundstage isn't quite as big, they also don't sound as "live" as the Ohm's, Klipsch, or JBL

You may be tempted with Klipsch to try the Palladiums - I did.  I wouldn't get them for metal.  Too lean in the bass, to bright up high.  I had the P37's. Good speaker, but too lean.

Focal - forget it.  Too bright, too lean for a given size.

Used Wilsons - might do the job nicely depending on model and how you feel about the focal tweeters.  The new wilsons with the softdomes are pretty nice.

Golden Ear - I have mixed thoughts.  They thump, they are not bright, they throw a big soundstage for the most part.  But I just didn't love the midrange.

Don't get caught up in the price.  More expensive doesn't always mean you will like them better, even though they may "measure" better.