I like to use the MXR EVH Phase90 on the "script" setting, set to a very slow sweep. It gives you a nice treble goose but is not too obnoxious. The "block" setting is a more modern, cutting phase and is more up-front. As a booster, been through 'em all: Distortion+, TS-9, FulldriveII, Zack Wylde OD, Fatboost, etc. I've been happy for a few years with the Xotic RCBooster. It really kicks a lead channel in the head and does NOT alter the guitar sound unless you use the bass/treble controls. I'd also like to check into a Keeley KatanaBoost or a Bad Bob Booster.