i ran the bullydog for a long time. after i tried the smarty i could never go back. i would suggest looking into multiple different programers and chips.
some of the better ones to look into are: Smarty, TST, Diablo sport, Van Aaken C5 or 3. 1 or 3. 2. those are just some of the better ones on the market at the moment. you can expect to gain power and fuel milage with all of them. some of which will require other mods if run on higher settings. like the addition of a stronger clutch, turbo, and fuel pump. just a start.