If you have time in the 172RG, now you get to ride her fat sister. I personally love the way the 182RG flies. It's heavy, but not too much, it's solid, but you can always put it where you want it. It climbs well, is resonably fast (our will do 155 KIAS at 4-6k with ease), and the gear fold away, like a real airplane.
A good thing to note about them though, don't listen to the POH/Placards about flap extension speeds. Check up on some of the Cessna forums. Our was down for a few months because someone oversped the flaps. After some snooping around, seems like the RG has a problem with the flaps. It bent up a bunch of stuff, and the flap tracks had to be replaced (wet wings makes this a pain, you should know). We now use 120 kts for 10 deg, and 90 everything else.
Oh, and do me a favor, don't use the electric trim to get it into the flare. I had a comm. student do that to me and we almost went into a trim stall. Just don't be a nancy boy, and muscle it into the flare.