The age old question of web wheelers... Rubi or Sport.... there are about as many answers as there are Jeepers.
My answer would be this, I have a Rubi simply by dumb luck. Now that i have one and wheel it, I think I would never consider a non-rubi now. Now that is not to say that non-rubi's are incapable, they are very capable. I like the convenience of being able to have built my Jeep up to 35's and not need to re-gear (manual trans) I like to push the button and the sway bar is disco'ed, I like to push the button and front & rear are locked (yes, available aftermarket). For me the biggest and best thing is the Rock-trac transfer case. IMHAO, that is the cats ass and you can't beat that.
You do need to look at what kind of wheeling will you be doing... FS roads or full on crawling? Everyone starts out on FS roads and you get the bug to continue to grow. Next thing you know, your on the rocks wanting to do upgrades that the rubi comes with.