After 15 years of trusty service, the time has come to upgrade my amp. I am looking for something lighter, with a little more power, and of course better sound. The sound I am looking for is warm, clean, smooth etc. you know what I mean (I hope). So heres my checklist: 1. Great sound 2. Lighter than 23 lbs. 3. More than 300 Watts into 4 ohms. I will be using it with a Yorkville 2x10 (small rig) and Hartke 4x10 plus the Yorkville (big rig). Both are 8 ohms. I am thinking of trying out: Eden WT 400 WT 550 Euph. iAmp 500 iAmp 800 Any suggestions for other amps that I should check out?