Best amps for rock and heavy metal

I was listening to Metallica and Tool last night - and my system does a great job with it. I'm using Aerial 10T's and a Levinson 336 amp.

Tool has lots of very low freq information - so you want a speaker that can go low - and you will need an amp that can deliver the current to drive it and control the woofer.

I tried the Levinson 432 and found the 336 to be much much better to my ears (eventhough the 432 is rated at 50W more power). I was honestly un-impressed with all the 4xx series that I listened to (I heard all the current 2-channel 4xx's).

I wouldn't hesitate to try the 436 mono's however. I have also heard that the 3-channel Levinson (433 maybe?) is a very good sounding amp - but is lower powered.

To me - I still think the later 3xx series (334/335/336) are tough to beat.

My experience with Krell is that they are superb in the lower frequencies - but I didn't care for them otherwise.

No experience with the Mcintosh or accuphase.

Hope that helped a little good luck.