I second the 30-06, or 3rd or 4th. lol... most versitile one gun caliber ever in my opinion. Big enough to shoot anything on the North American continant. The only reason you will ever wish for a different caliber is because they are there, and no man can own too many guns?
Anyway, I strongly suggest the 30-06, and I don't think the Tikka can be beat for the money. Great trigger.
Have fun w/ it, Steve