So my Ampeg SVT 4 Pro is sitting in the shop for it's 8th week now because apparently if something goes wrong it's a biatch to get parts due to Ampeg shutting plants down. Lame. The 4 Pro is okay I guess when it works but it lacks balls and finding the right tone is a challenge and a half. I definitely need to upgrade to tube. The SVT Classic was on my list but at this point I think I'm done with Ampeg. What are everyones thoughts on a comparable amp?