What is a good combination for Proac Res 2.5?

Try with ear amplifiers. Very nice sound.

sonic frontier power 3's and line 3's one of the best systems ive ever heard

I have a pair of ProAc D80s which I had been using with an Audio Research VT-100 MKII which sounded very good and quite a good match. I had used this same amp with my previous ProAcs including a Response 3.5 and then Response 3.8 also with great results. I previously owned or auditioned various solid state amplifiers including Krell, Mark Levinson, and McCormack with my ProAcs but none could match the lush sounding VT100. All of these amps tended to bleach out the harmonics somewhat. However, I recently auditioned one of the new Class D amplifiers, the H20 Signature Stereo ($3000) and was so impressed by it that I bought one and sold my VT100. Being a tube lover I thought that I could never do without a tube amp until I tried the H20. A great match for ProAc in my humble opinion. H20 Audio offers a 2 week trial period. Check out the website at www.iceh2Oaudio.com . Also check out the review on 6-moons by Srajan Ebaen (April 2005) which gives a good insight between the sound of the H20 and tubes.
Incidently, my preamp is an Audio Research Reference II modified by Great Northern Sound.

Interesting note Rlf! I love my 3.8s with an ARC D250mkII, brute tube power. Can be scary at times!
However there is certainly a cheap alternative to try out tubes on your gear. I'd look into a second (or third) hand D125 on your 2.5's and enjoy.

I am wondering if the ARC VT100 would be sufficient or would the VT200 be any better for the Proac Response 2.5's. I am not sure which one to go after. Any thoughts?