I'm running a Warn 9000i and it has never let me down despite being put through it's paces a fair bit and even submerged a couple of times Only using steel rope although I am contemplating a switch to synthetic. I think Warn are more expensive but then I have always beleived that you get what you pay for.
i am a firm fan of the superwinch, when i worked as a recovery driver we had supa's on all the vehicles and they never failed, thats a good enough testimony for me