best option would be to make your own. i found a decript x-arcade single player joystick for cheap at a swapmeet. i fitted it with sanwa parts and it pretty much ruled.
edit: forgot to answer your original question. i had a buddy who had that madcatz sticks and it was really keen. looks like both have sanwa parts so i'd figure it'd be better to go with what's more aesthetically pleasing. i know alot of people in the arcade community sure love that q4 though.