So I recently purchased a Microtubes X7 and I absolutely love the distorted sounds I can get out of it. It's a beast of a pedal. I can get some pretty decent clean sounds out of it too but I'd like to buy another preamp that can do better. I know the DG Harmonic Booster seems to be the obvious choice but I've heard people get some really good clean sounds out of the SansAmp also. Just curious, what preamp do you guys recommend for getting a good clean tone? I play mostly rock and some metal. I know it really depends on what sound I'm looking for. I play mostly modern rock (Tool, A Perfect Circle), classic rock (Black Sabbath, Led Zeppelin) and some metal. I'm mainly just looking for something versatile with really good sounding hi-mids and a tight lowend. I'm pretty much trying to decide between the Harmonic Booster and the SansAmp but I'd like to see what some other people suggest before I make up my mind and buy something...