Welcome to the board.
If I had to pick one cartrage, for the hunting you would do, and for the area you live...I would buy myself a 7mm Rem Mag.
The recoil is moderate, and the balistics will do you well in the flatter country. It does well on moose and is considered Old fathfull for some Elk hunters. Finding amo might be alittle daunting in some smaller places, you might find it but the selection would not be there. When you buy one, if you so decide, I would offer you these tips...buy a few selections of rounds and see what fires the best for you...and buy enough of the best one, that you won't have to worry about needing any for a while... SHOOT LOTS, and when you think you know what your gun will do at everyrange,,,shoot more!
Spending large money on a rifle might be better spent buying the best scope you can aford!