Hartke VX3500 Bass Guitar Amplifier. This is a very popular 350W 4x10" combo bass amp and has an impressive dual preamp, loud volume and tone shaping features. The street price is under $800. For a detailed guide to Bass Amps see http://www.guitarsite.com/best-bass-amp/
MAGELLAN 800 Bass Amp. This is the latest bass amp from Jeff Genzler who was formerly the founder of Genz-Benz. This dual channel bass amp has the output power ratings: 400W/8 Ohms, 800W/4 Ohms and 800W/2.67 Ohms and has a street price of $759.
Carvin Tube Power Amp http://www.carvinguitars.com/products/TS100