I have been using my 5150 head to as a power amp in my AF2 rig for the last few years. I have been wanting for a while to get a solid-state poweramp to run in my rig to remove the tube coloration of my 5150. I came across a Carvin Fet 450 on eBay for $275, a good price. My understanding is that an FET amp will still have a little tube feel but lacking the coloration of say 6L6's or EL34's. Anyone have any experience with these amps?