help with new tires.

[BrockWed]

I currently have the stock? diamaris 4x4 all season tires on my 4.4 X5. Today I had a blow out, and with all the tires low on tread I finally decided that new tires are needed ASAP. I am going to college in Pullman, WA (if not familiar very hot in spring/summer, and very cold in fall/winter. usually have snow on the ground for about 2 months off and on, ranging from an inch to a foot or two.) I live 3 1/2 months in Seattle when I am back from school which is in the summer months. I am looking for a tire that I can use year round so I don't need to shell out extra money for two sets of tires. I heard good things about the BridgeStone Blizzak LM-25. Not sure if these would have good dry summer traction and if the tread would last year round use. Sugguestions and thoughts are more than welcome