Well, whatever you decide, make sure you buy your tires BEFORE you get to Alaska. If you don't, you can expect to pay $30 more per tire.
With the BFG M/T I have had great performance with them for being so cheap (I got them used with practically no miles) and they really do well in the snow. If I had my choice, I would have run the TSL's but money constraints wouldn't permit me to.