This could open a whole other can of worms, but I have to ask: why isn't the PS3 being considered?
Firstly, I'd like to thank Pale a ton for letting this stay, and thank EVERYBODY for being so cival and helpful.
Now, In answer to insanolord, the reason that the PS3 is not in the runnning is the simple fact that ALL of the Groomsmen have wiis (And insane as it sounds, we actually do play online) And half of us have 360s (Myself included) where as none of us, nor any of is other friends that I know of, have PS3s. It's just that dumbly personal.
As to Netflix, I had COMPLETELY forgotten that Wii would be getting it. Thanks for the reminder!
My sister and his Fiance have an interesting relationship when it comes to games. Though she does not tend to play them herself, she DOES often watch him play. So on that note, I see a big pro for both. The 360 is obviously more graphically impressive, though I have no idea how much she would care. And the Wii has games like Zack and Wiki with its much more casual "multiplayer" mode that is actually pretty similar to watching it.
Another factor is the Virtual Console. My Brother is a HUGE Retro-Gamer.