Several possibilities really. You can go with an off road X or H mid-pipe and weld in your favorite mufflers to get the sound you want. Larger tailpipes aren't necessary until you reach big horsepower numbers. My car has ran 12's N/A and mid-11's on nitrous with the stock tailpipes
Just get some offset 2 1/4 mufflers and weld 'em in. Power levels are all pretty close with the big popular name brands, so go for what sound you like. My car was like this when I got it, then I went with a Off Road H pipe and a new "cat-back."