I have a BAT VK200 that I use with a BAT 30SE Preamp. I had an Audio Research LS 25II when I purchased the BAT amp. There is no doubt that with the BAT VK200 the 30SE is superior in almost every regard. I believe that this is due to synergy between the same companies components, not necessarily due to better better build quality, technology, ETC. I would expect that the Audio Research preamp would sound better than the BAT if the amplifier was an Audio Research VT100.
I am told that the VK200 is a better sounding amplifier than the VK500 in situations that do not require the additional current offered by the VK500. If your Hales are reasonably efficient I would suggest you listen to the VK200 before you make your final decision. Good Luck
I am told that the VK200 is a better sounding amplifier than the VK500 in situations that do not require the additional current offered by the VK500. If your Hales are reasonably efficient I would suggest you listen to the VK200 before you make your final decision. Good Luck