I was checking one post here on TB that mentioned the A+ Buzz Overdrive by Shift Line and I've found this preamp on their website that seems to be really good. At least considering the specs on their website: tube preamp (1x12AX7), 3 band eq, fx loop, separate headphones/line out volume, heaphones out, Aux in, IR cab sim. Not cheap but I feel my GAS meter going up with this one.