Im going to have to go with Soultorn on the Crate heads. I have two of their solid state heads, the GX900H and the GX2200H. They're both fucking great. Give a nice distortion and all that jazz. The GX2200H is the best for your money, IMO. They will run you around $420 USD new, but you might be able to find one cheaper used. And don't worry if it's used. My GX900H has been to hell and back and it works great.