Here's a great small yet powerful head for your rig. Can be used for all styles of music and has great tonal variations.
http://ampegportabass800.shutterfly.com/
Ampeg PB800 Portabass 800W Bass Head Specifications:
* Dimensions: 15 x 3-3/4 x 12
* Weight: 20 lbs.
* Solid state preamp
* Power Amp (Micro Dynamic Technology): MDT
* RMS Power Output (2 ohms): 800 Watts
* RMS Power Output (4 ohms): 550 Watts
* RMS Power Output (8 ohms): 300 Watts
* Tone Controls: 3 band Rotary
* Ultra Low/High Boosts
* Balanced Line Out
* Effects Loop
Ampeg PB800 Portabass 800W Bass Head Features:
* 800W @ 2 ohms 550W @ 4 ohms and 300W @ 8 ohm
* 2 separate channels
* 2 separate EQ sections
* 3-band EQs with sweepable mids
* Effects loop with effects blend
* Ultralow and high boost
* Compact (15"W x 3-3/4"H x 12"D)
* Rackmountable
Amp is selling with soft case for transport, comes with rack ears to make rack mountable. Shipping is included and the selling price is 500.
PM if interested. Please no international sales.
I just had the power supply fixed on this one, but it sounds fantastic. I tried it through my Epifani 4x10 and my Portabass 2x10. PM for pics as well.