Do you need a new amp? I'd go with the TSL. I'm getting away from solid-state. I have a valvestate that I have trouble getting good sounds at volume. It sounds very thin, but it has an awesome clean sound. Granted it's different than the AVT which has a 12AX7 in the preamp to warm it up. I tried one at GC and actually liked it. It's got built-in FX, but you can only use one at a time. At volumes, though, I suspect the TSL is going to sound better. If you ever wanted to trade it, I think you'd do better with the TSL--kind of like the difference between a Honda and a Chevy, if you will.
Otherwise, save up for a 7VWH! Yummy. I'm partial to the re-issue FP, but I bought an SBL last year. Mods, you didn't just read that.