Well, I grabbed a Logitech F310 from my local Walmart. Not bad at all so far! Really like being able to switch movement controls from analog stick to d-pad at the touch of the mode button, so much better playing Rayman 1 with the d-pad as I was unable to do that with the 360 controller. I have yet to test it on fighting games though.

Now I just hope the thing lasts.

Edit: Just tried it on Guilty Gear and the d-pad works so much better! I think this pad will work well for me. Thanks to all who gave suggestions!