I know there is a lot of debate around here regarding micro heads vs lead sleds and yada yada. My tube head is going nowhere, but it has let me down twice in two years. I think it's a good idea to invest in a class D head. For two reasons: Portability: Those rainy night thursday night gigs I don't really want to play, I don't want to kick my heavy tube amp around. Backup: It's nice to have an extra head in my gig bag. I see a lot of brands are putting out bad designs. To prevent debate, let's not mention them. I'm currently considering an Aguilar TH 350. The price and weight can't be beat. Also, being made in NYC, I love supporting my local economy. I've read a lot of people saying their heads cut out, or even blow up. This is unacceptable IMO. Is the TH 350 a solid head that can be pushed?