www.avahifi.com get a few double die 550 units, save money better sound, bi amp with the van alstine phase inverters. Audio by VanAlstine will get you better sound for less. I use 4 1200W Hafler P500 rebuilds into VanAlstine Insight double die about 1200W each for a toatl of around 5200W or more, it's a sonic experience, that is incredible, more watts more control, lifelike slam and impact with complete bass control, I use teh Xilica DSP processor from Legacy on my older Whispers, incredible lifelike sound. Get teh Van Alstines, not the over hyped heavily advertised over hyped stuff.