I also use the VK500 w/bat pack, and have found it to be a very nice amp. Solid low end, smooth highs and a fairly liquid midrange for SS. However, my Alon V/Circe speakers are voiced for tubes and I am considering ASL Hurricanes as a potential upgrade/change. In the meantime, the BAT does a fine job for my needs, and betters my previous amps by Aragon, Classe', and McCormack. It is all about synergy. Do your speakers require more than 250 watts per side? Are they voiced for SS amps or tubes? What types of music do you listen to? Where would you like your system to go in the future? These are some of the questions which can help you find the right components or upgrades for your system. Good luck with your new BAT, it is a great amp.