First off, Poor Grizzlies!! Go Cats!
Kalispell has great skiing. I think it has the best snow, consistently, in the state at Big Mountain. There is more to ski at Big Sky/Moonlight, but Big Mtn isn't bad. I've never been to Blacktail so I can't speak on the skiing there. I know if you backcountry ski there's some good places as well.
If you like to wet a line, you have a huge lake to go catch lake trout on. The limit is 100 per day so you can fill a freezer pretty easily with fish that average around 20-25 inches. I've never fly fished up there but I'm pretty sure it's not too bad. It's not Bozeman where you're surrounded by blue ribbon rivers, but I wouldn't I don't think its too shabby. The Swan River looks like a pretty sweet place to fly-fish. Like was mentioned, there's also the Seeley-Swan Valley. I'm pretty partial to that area as we have a family cabin on one of the lakes, but there's a ton of fishing opportunities on a lot of lakes. Hit up Lindburgh Lake in the fall. I had never fished it until this last fall when the wind was too much to get on Flathead(the waves can be huge). Ended up going to Lindburgh for the first time. I'll be back. Take your wife for a visit and stay at the Holland Lake lodge...she'll want to come back.
There's a lot of people that duck and goose hunt on the Flathead River. Quite a few sloughs to get back in to. And you can fish for pike in them as well. I know of one guy that will ice fish in the sloughs and keep his shotgun with him for when geese fly over head. Lots of turkeys around the area as well. I've never hunted for them, but I see lots in the fall.
I can't really speak on the food in Kalispell. Since I go up there each fall for the Mack Days tournament, we mainly eat in Woods Bay or Big Fork. The food in Big Fork is pretty good. It's kind of a cool place. Kind of like Big Sky is to Bozeman. Very wealthy people with lake homes vs. very wealthy people with ski resort homes. One place is dead in all seasons but winter and one is dead in all seasons but summer. Big Fork also has a playhouse during the summer so if your wife likes to go to plays or musicals, they put on a pretty high quality production.