I've been running the factory tire carrier with a 35 for almost 3 years now. I haven't had any issues.
The only thing I did was cut the brake light off of it to get it out of my way.
Warn is the only option in my book. I've put mine to a lot of use pulling myself and others in all kinds of conditions and it's been more than worth the money
My moms jeep got hit by a guy going way to fast and not paying attention to the intersection he was blasting through. Lucky she was in a jeep and it held up well. She sustained no injuries.