Yeah, we've pretty much exhausted the options for Green bears. The Caller would be good in case of board sweepers. I only brought the other two out for the sake of bear flavor. I don't think I'd pick either even in a unrestricted deck.

Given the theme, I like the deck as you've listed and I think all that's left would be to test it out. And to add 2 Dolmen Gates to the side sideboard as well.

I would just like to add that card altering is becoming rather large and excepted in almost any field of play except the professional level. So if you don't want to play Overwhemling Stampede because it has a rhino on it, paint of it with a swarm of bears and rename it BEARALACHE!

Ever had a Stasis deck played on you? I wanted to CHOKE that guy.

I am now satisfied that there are enough bears in your deck.

Oh yeah, I know the hatred of which you speak.

Yes, Stasis/Kismet decks are among the worst when it comes to having to play against. They actually had to create a card to counter them (Sands of Time).

I usually stay away from countermagic decks now, though years ago I had a deck called "Circles of Cheese," which was a White/Blue deck with two of each Circle of Proteciton (including Artifacts), various counterspells, and then mind bend/magical hack with Karma to win. When Urza's Saga came out, I used the Runes of Protection instead, which was far more effective because I could cycle out the ones I didn't need.

My favorite combination with that is Avenger of Zendikar + Liege of the Tangle + Doubling Season. Turn all your forest into creatures, double season to double lands, then get a crap-ton of huge plant critters.