If you like infectiously-fun-and-yet-moderately-serious musicals (and want something for more general family entertainment), Hairspray might be a good choice too -- it gets a lot of repeat play in my household w/ 2 grade school kids (and even a toddler who also loves to boogie to it
).
I haven't seen Enchanted yet (though I plan to do a blind buy at some point), but that might be a great choice also judging from all the rave reviews.
But yeah, I'd second most of the other suggestions as well. It really depends on what kind of film you feel like using for that "maiden voyage" w/ your brand spanking new HT.
_Man_