Hi Don, The old Ibanez Tube Screamer is hard to beat for if your looking for seventies type "blues/rock" distortion: compressed, thick and sustainy. Ibanez has reissued it at a reasonable price and I believe you can find it at Elderly.com. I have a TS-10 version,which I was lucky enough to find in a pawn shop for $50, and I occasionally use it with my OM Larrivee (which is outfitted with a Duncan Perfect Timbre pickup) through a Marshall acoustic amp and I get a sound akin to a 335 through an overdriven tube amp. A soundhole cover is kind of a necessity to discourage feedback.vl