that helps me a lot too.. what is the overdrive of choice .. birthday coming up.. i see ibanez tube screamers and even THEY come in several types?
or is that a dumb question?
i would go with either the boss SD-1 (SUPER OVERDRIVE) or the BD-2 (blues driver). I also have an vintage MXR distorti0n + (rarely used) I play these through a fender blues deluxe and the tone is amazing. i rarely get the the volume up past 4. but having these pedals gives you the ability to shape your sound without having to get too loud...if you can get a tube screamer you can get that SRV sound which is cool as well...or if you are intrested in hendrix, go wiht the Dunlop fuzz face and the rotovibe...
at the end of the day, if you have GAS (gear aquisition syndrom) like my self, you will have to a master swithc board to select which style you want to play, ie jerry, srv or hendrix....too difficult to pick one..
good luck! and remember that tone is king..