I'm trying to decide if I want to go full tube, or go with a micro and keep the SWR as a backup head. I read there are some issues with the pf 500. Have those been solved in the new runs? Or am I better off going with the pf 350. Paired with a set of GK MBE ( 1st series). I play active basses, a Washburn xb105 with active EMGs and a squier vintage modern jaguar HB. Looking for a warmer tone that the SWR isn't giving me. Cabs are a 2x10 and a 1 15 400 watts a piece 8 ohms. This would save me some money in my pocket if the heads r worth it.