I'd go for the costco one at a lower price, the ramp and joker don't really add much except to slow things down a little. I'd check that the costco one can also be updated to the latest code as it added quite a bit on the pro model.
I have the pro and it's a brilliant game. It could do with one final update to make some use of the missions and also to address the ridiculous amount of ramp shots you need to make to get Lucious lit.