I'm thinking about a rack to hold a spare 37" tire. I see a few racks out there that mount in place of the tailgate. Anyone have any experience with these? Recommendations?

Here's a few that I found. Needs to be quickly removeable if I have to haul anything.

http://rockymountainsusp.com/Tub_TireCarrier.htm

http://www.truckcandy.com/TC/RatCage/RatCage.htm

http://www.performanceproducts.com/productpage.aspx?pid=110966&name=Tiregate+Spare+Ti re+Carrier