Well, first of all -- the $2,245 is for the Elite Premium, which is a very special, very limited edition. Look at the description for all the extra labor that goes in, plus the carbon fiber grips. The Premium is, in my opinion, intended as a collector's piece.
The regular Elite is just $200 more than the stealth, which are fitting and polishing time that are mostly cosmetic, but also functional.
I don't hear anyone complaining about the fit and finish of any R-9, so buying the upgrade is hardly necessary--unless its what you want. All R-9s receive a lot more hand work and fitting that most guns on your dealer's shelf.