I use a Logitech Extreme 3D Pro, and am quite satisfied with it. A nice step up from my old Attack 3. The trigger has gotten a little loose after a year and a half of serious abuse, but the stick is still pretty sound. The base buttons are a bit odd to push, and the buttons near the hat don't register every single time, but that could be because of the aforementioned abuse.
Go with the 3D Pro, it's cheap, sturdy, and cheap.
I have no experience with Saiteks, so I have no opinion on their products.