Considering a POSSIBLE replacement for speakers. Opinions?

Hi, and thank everyone for their responses so far. I should have set aside time to make a proper post rather than ask a simple question...because we all know there are no simple questions when it comes to audiophile questions, right?

First, artemus_5 is right. I had thought I'd listed my current system in my profile but apparently not or it got lost. Get ready, it's a mismatch of equipment that still sounds beautiful.

Source: OPPO BDP-105 ( not the audiophile version )

Preamp: 1993 B&K Sonata Pro-10 MC ( totally refurbished 4 years ago ) 

Amplifier: a matching 1993 B&K Sonata ST-202+  ( the rare kind, totally refurbished this year )

Speakers: 2008 Monitor Audio Silver RS8

This last part eliminates a lot of suggestions so forgive me for not mentioning them.

Subwoofer: 2 Sunfire SDS-12 subwoofers. Two of them.

I listen mostly to prog rock from the UK and US along with Zeppelin...70's stuff, and moving forward all types of EDM from Marshall Jefferson to Orbital to Underworld, Daft Punk, etc. More rarely I do listen to large classical orchestra pieces like Beethoven's 9th.

Clearly, I can have a block party with this system if I need. It's been quite some time since I changed or added anything but...you know how it is. My speakers are 12 years old now and that itch is back. But maybe it's just an itch I don't really need to scratch. The B&K stuff cannot be replaced by anything reasonably priced that equal their abilities so about all I can do is upgrade the speakers. Call my budget for that around $2,500-$3,000.

So, can I get a better sound by upgrading the speakers in that price range? Thanks Everyone!

Again, apologies for not listing all the components. A Cardinal Sin, I know.

Also, I am located in the Dallas-Ft Worth area if that helps at all.

*sigh* I had a really nice, detailed post as a reply going but I hit the wrong button on my phone and Voila!, gone.

I'll try to recreate it later. For the moment just the down and dirty. I've listed the components above in a second post....mea culpa, that should have been in the first post. Along with room dimensions which are 20×20×13 so roughly 4800 cubic feet. Again, mea culpa, I should have added that. I will add more but for the moment I have one question.

I've found a set of much more modern Monitor Audio Silver 200's from a dealer with a full warranty ( i.e., they are legit ) and free shipping to me. So I am asking people who may have heard both speaker systems, my 2008 Silver RS8's and the newer Monitor Audio Silver 200's if there is an appreciable difference between them or is the difference so small it's likely to go unnoticed? 

Thanks,

j