There are literally dozens of great amps in that price range. If the sub input filters out the lowest frequencies, then your power requirements are not all that high. A Pass 3 or 30 might be a good choice, 30 WPC Class A (so it will run hot), but very highly regarded. Another great SS choice would be a McCormack DNA 0.5, modded by SMcAudio to Rev. A+ status. 100 wpc, really sweet sounding SS amp that runs pretty cool. A used regular unit would set you back about $600, and the upgrades another $1200-$1500 or so. Any Steve McCormack, the original designer is available at SMc and very approachable regarding advise. There are some Canary Audio discontinued 300b push-pull units on sale on Audiogon for about $1750, less the 300bs. It needs 4, so you might be topping out, $ wise, but that should be a very nice sounding unit. You might try posting on Audiogon; more folks there up on speaker/amp interactions.