Grats!
Wii Play is worth it for the Controller + $10 premium, I think. We're gotten a LOT of play out of it. Target Practice, Laser Hockey, Tanks, and Find Mii are all pretty fun.
Haven't played SSX Blur, Tiger Woods, or Tony Hawk. I've heard SSX is fun once you get used to the controls, though. Rayman Raving Rabbids is a lot of fun, and of course Zelda and Paper Mario ROCK.
I concur; the wii play is a lot of fun.