I have heard and seen a number of opinions that criticize the VK-500, but have seen or heard nothing negative concerning the VK-200. I personally have owned a VK-200 for about 2 years. Its a great amp that puts out a ton of power, operates mostly in class A (I measured the power draw at different volume settings, and it didn't change, and it runs quite hot), and sounds sweet, very extended top end and a ton of low end slam, nice detail as well. Here on the 'gon they are available cheap and I would highly recommend them. I am using with the SF Line 2 preamp (tube) and Vandersteen 2Ce speakers.
