I actually just received a new pair of Saitek rudder pedals in the mail a few days ago. I cant begin to describe how fantastic they are. Flying the shark is so much easier now. I used a twist stick before and while it worked I knew the shark wasn't flying right. When I twisted the stick I would inadvertently pull it to one side, messing up my flight path. Plus since I couldn't hold the stick in place for the rudder for any amount of time I was constantly having to trim, and re-trim every few seconds. This caused all sorts of problems and performing any kind of hard maneuvers were a chore.
But now all those little conflicts of having all 3 controls on one stick are gone, and the amount of trimming I have to do has been cut in half. It now flies like it's supposed to, very easy to control and maneuvers like a hammerhead are very fluid now and there's no "back talking" from the aircraft anymore.
The Saitek pedals do have a spring that returns them to the center, and you do have to do this every time you trim, but since you'll be trimming a whole lot less it isnt a big deal.
I bought mine from Gogamer.com for $95 but now they're out of stock, it seems like everything there is out of stock.