I like the Palms, but their offers suck.
I guess they won't get any better with Stations taking over. I love Red Rock and GVR and get their "A" offers, but that's only $250 free play. Pretty bad when the A offer is that low. Of course, they have the play and stay offers where you can earn up to $1000 more free play with play, so that helps ($100 more at $25k + $250 more at $50k + $650 more at $100k). The good thing also is that when you swipe your card at the kiosk you will still get your regular monthly free play in addition to the up front free play offered with the stay and play offers.
But between Red Rock and Palms, I think I would stick with Red Rock.