I consider the Von Schweikert VR2's a diamond in the rough, but after adding internal bracing and damping the speaker baskets with modeling clay this diamond really begins to shine. In my 11.5' x 15' room the speakers have always sounded on the warm side of neutral, and with a solid low end to 25 Hz I was looking for a clean sounding neutral solid state amp. The Audio by Van Alstine Insight electronics fit the bill perfectly, I bought the Insight 440 amp, EC pre-amp and DAC.
I would guess that most people who have bought the VR2's have a beer budget, the no-nonsense AVA products are very affordable but also have impeccable sound. Or I should say they have no sound of their own. The entire Insight series: amp, pre-amp, and DAC, are completely neutral; what you hear is on the source without the electronics adding their own signature. The sound can be shocking at first if you are used to tube gear or less well engineered solid state electronics. No mid-bass hump, tube bloom, screechy highs, or boomy bass, just clear sound that draws you in and never harsh no matter how loud you like your music.
Keeping with the well engineered philosophy, all AVA products come with a 2 prong captive power cord which minimizes ground loops (also you are no longer tempted to spend hundreds extra on after market power cords) and because Frank knows what he is doing, speaker cables do not make very much difference to the amps sound. Read about how lamp cord (Frank's cable of choice) compared to MIT's $1500 a pair super cables in an A-B test at the 2008 RMAF:http://www.audiocircle.com/index.php?topic=60159.msg539789#msg539789
The two Insight products that made the largest change in the sound are the DAC and pre-amp. The DAC certainly deserves all the praise it has received so far, once you hear it in your system you begin to wonder what an entire Van Alstine setup would sound like.
AVA has a 30 day trial but very few people end up returning their electronics. Give AVA a call to find out more, 90% of the time the person who picks up the phone is Frank, you can discuss your system, how you would like it to sound, and based on your room and speakers get advise without any bullshit.