Honestly leave it stock. I have magnaflow mufflers. While I like them they also have terrible drone at certain rpm's. Mainly 1500rpm to 1800. Terrible.

If you want just a little bit more throatyness you could replace the resonator with a glasspack. But do like a 24 or 32" I'd leave the mufflers alone if your on a budget.

A good muffler for non drone and good WOT noise is Dynamax VT. But they are pricey.