Just been browsing around, looking at heads again and am thinking about the Ampeg SVT-450H. I play in a metal band with a Genz Benz El Diablo half stack on one side and a Marshall JCM 900 half stack on the other side. Right now I'm running a single 18" speaker and my Kustom Groove Bass 1200HD at 8 ohms(450 watts) and it seems to do the job. Now obviously if I wanted to utilize the full 450 watts from the Ampeg head, I'd have to get a 4 ohm cab. I was thinking that if I made the switch, I'd get the 610 cab. I've heard that some people think Ampeg exaggerates their solid state wattage. I've read several other threads about this head and the results have come back about 50/50. So I'm going in for a second opinion.