The Rogue 99M out performs the Quicksilver and then comes the CJ 14 (a little slower sounding maybe boring to some), then the AL 3A preamp. After that the Counterpoint SA-5000 bettered all of them (look at the used 5.1s on Agon now). Others that worked well with the X-250 were the Joule LA-150 (all their models are fine) then the Tom Evans Vibe which out performs them all but way more money.
Happy Listening.
Happy Listening.