How many hotel stays/nights do you do per year? If it's more than, say, 10 nights per year, then there's a pretty good chance that you'd be better off earning hotel points and forgetting about the 500 miles per stay.

The only one in your list that I know well is Hilton - although I understand that Kempinski and Movenpick are both quite good. I'd try to see if one of those chains can cover most or all of your hotel stay activity and then focus on doing all of your business with it. (Radisson is part of the larger Club Carlson program that contains several hotel brands. Hilton is part of the larger HHonors program that includes Doubletree, Conrad, and others.) There are active forums here for both Carlson and HHonors - and you may also want to look at Starwood and Marriott while you're at it and see how well they map to your travels.

Most people here are every bit as active in at least one hotel program as they are in their preferred FFP. After all, if you redeem a flight award somewhere interesting, why not redeem an award for a nice hotel while you're at it?