Most techs do say replace it with an oem one. However I dont have that big of a wallet. I puchased the one from kregan oriley for 200 bucks with discount. Works great and I think it has a good warrenty.
Its not hard to do either. Takes maybe 15 minutes.
But if you do decide to go oem go to
www.courtesyparts.com they are usually cheaper than the dealer.