I've been a big fan of the Fulltone FatBoost for awhile, and use that in front of my rig for a little something extra

I usually kick it in when I'm using my Strats- it really boosts the single coils and brings them up to about the same level as humbuckers, but without any additional gain.
Lately, I've been using a TS-808 and an original TS-9 with my setup as well, which gives me a couple of extra "channels" and gain stages to play with. I've got them hooked up through my GCX switcher and can turn them on/off with my Ground Control Pro.
Another pedal that I've become very fond of is the Fulltone Ultimate Octave...ever since I got "
Crystal Planet", I fell in love with Satch's tone using that pedal! A great fuzz/octave boost that's very toneful and musical.