I don't mean to sound redundant here, but the pro design will probably save you money on a rebuild. And I doubt you would ever notice the performance gain between the two, especially if you're riding on trails with creeks and ravines. I personally push for the pro design...it's a solid design and simple to apply. I think that the 1 into 2 is a mistake unless all you do is dune ride. I'm sure that's what it's made for.

Later all,

Jason