TS808 (Holy Grail of pedals) TubeScreamer... some people like to use two, one for the lows and one for the highs... Also, a Dunlop Jimi Hendrix Wah. And if you want to include the entire spectrum... A Fender Strat with vintage series single coils... and a tube amp... fender or marshall. Thats the most popular and stereotypical blues set-up that you will find.