meangene:
you might take a look at these. the world series stewart amps have won every design innovation award out there over the past 5 years. i would consider connecting your subs in parallel, and running the 600 in bridged mode (600 watts @ 4 ohms). it will kick butt, and is a decent $ value. small, powerful and great for just about any use...especially bass.

http://www.musiciansbuy.com/stewart_world250_world600_power_amplifiers.htm