i have a chevy s-10 with a 2.2 4 cyl. the question i have is what kind of muffler could i get that would increase mpg, and low end power. without sounding like one of those cliche ricemobiles. this is my daily driver so a little louder than stock is ok by me, but all out constant noise will get old quick.
anyone have any suggestions?

ive already got a high flow cat and duel outlet but stock muffler

Just changing the muffler will not gain you much. You need to look at the whole system. I really doubt there is much you can do for a decent price that will change your mileage to the degree that the cost would be justifiable...
Mark