I agree, unless you really, really like the 5 on 4.5" bolt pattern.
Moving up to 5 or 6 on 5.5" will allow you to use the much stronger full-size hubs. The Hub conversions use the Explorer type of hub, not the Warn Premium hubs. So when you take the tire off the hub will come off, IIRC. The hubs are also made from composites and not metal. I think you're looking at around $900 for a Warn Hub conversion and you'll probably need to get new disc brakes and have them bored out to fit.