I was going to build a F1 with group buy boards on DIY but the guy that was running it either ran off with the money or died.
So many choices on Ebay, makes it tough. The Toppings look like a good option for the T-Class.
I'm curious how some of the Chinese tube amps are. The Yaqin amps have piqued my interest a bit, seems you can get just about any tube flavor you want.