If I was only going to hunt deer (whitetail and mulies), I would definately buy a 270. that is the first rifle that I bought, and I still use it frequently.

However, If I were just starting out and felt pretty sure that elk were in my future, I would choose the 30-06 or the 7mm rem. mag.

All three calibers have relatively cheap ammo (compared to less popular calibers) that can be bought over the counter almost everywhere.

If I really had to choose one caliber, it would be the 30-06. You can buy the remington 125 gr. reduced recoil that kicks about like a 243, the 150-165 grain bullets for big deer and the 180 gr for elk. Hornady sells a "light magnum" 180 gr that has as much power as a regular 300 win mag.

As far as brands of rifle, you probably would be all right with any of the brands mentioned. I have winchester, remington, and ruger, and feel that these are quality firearms. I hear good things about Marlin, but have never owned one. Look for a sale, but remember, this is an investment that will last a lifetime, so if buying quality means another 100 dollars, just wait till you can afford it. After all, it will last you a long time. That 270 I bought is now 34 years old and still going strong.

Just remember, even if you think this will be the only rifle you will ever buy, chances are you will buy another at some point, so there really is no wrong decision here. I now have a .17, 22, 222, 243, 270, 30-06, 7mm, and a 338 win mag........ not to mention the 3 muzzloaders I have. D###, I need a bigger gun safe!LOL.