That is what I am using and I am truly happy with the combination. I was using a Bryston 4B-ST that is rated 250 watts at 8 ohms. I don't miss the extra power that the bryston had. What I gain was a smoother amplifier that does wonders with vocals. So my answer to your question is grab the Audio Research VT 100 MK II, you will be very happy with it. Now I am not playing music that loud though but the sound does fill the room.
Will ARC VT-100 Mk. II drive ProAc 3.8's.
ProAc 3.8's according to the ProAc web site are 88db at a nominal impendance of 8 ohms. I play all types of music at a high volumn. Room is 11x17x8. Would like to drive ProAc 3.8 with one Audio Research VT-100. Can't borrow speakers from dealer, no ProAc dealer in my state. If I need to I will use two VT-100's. Has anyone tried the 3.8's with one or two ARC VT-100's. Please let me know how it sounded.