I play in a cover band that does a little bit of everything. I'm using a Fulltone GT500 pedal, which I really like, for overdrive and distortion. I want to get another pedal to use with it that will kind of give me that ZZ Topp kind of distortion. I don't need to sound precisely like that, but more or less in the ball park. I'm considering either a Rat or an OCD. Am I on the right track? Any suggestions or opinions? How about Lynard Skynards' guitar sound on Sweet Home Alabama? Will the Rat or OCD suffice for that as well?