I tried a few different things before I settled on the V&H Cruzers. I tried Sportster mufflers with the goat belly in place and without it and stock mufflers without the goat belly. Really what sold me on the cruzers were that they were louder with a much nicer tone than the other things I tried and they looked a heck of a lot better.
As far as other things to buy, you should get crush gaskets to ensure there are no exhaust leaks. You shouldn't have to re-jet if you are just changing the exhaust, but opinions and experiences vary on that one.