Well like I said it's not a guarantee that it fits...basically, any wheel that does fit the '05 HAS to have those specs (same as the Dakota) ... but not any wheel with those specs is guaranteed to fit the X - because of the caliper issue. Does that make sense? It's like saying all Xterras are Nissans, but not all Nissans are Xterras.
Having the right specs is just a starting point for test fitting the wheels to see if they clear. The shape has to be right for the calipers to fit under there.
I don't know of anyone that's gotten the Nascar wheels yet. Someone at thenewx.org has indeed gotten the American Racing 329's. They look awesome, and I love them, but they are 17" I believe.