its better than stock because it flows more by a lot, but its not your best option since youre so lightly modded.
the best exhaust you can do is a stock catback (maybe with a high flow cat if you got some extra money) with whatever muffler of your choice. i actually like the stock mufflers because they have enough rumble for me and when i go WOT then quiet down and all i hear is blower whine.