ORIGINAL: Gundigest
Browning makes a good gun, however I think the A bolts are over priced. I like the 60 degree bolt throw they have, . As for the calibers you listed I would go with the 30-06. It is the most versatile caliber on the market, you can get factory ammo from 55gr to 220gr and ammo is found in every little gun shop from the east coast to the west coast. If you reload the choices are endless the 30 caliber has the largest bullet selection on the market. I personally don't care for the .270, it is a great caliber but anything it will do the 30-06 will do better. As far as reloading goes the variety is very small compared to the 7mms and 30 calibers and you are limited to lower weight bullets.
That’s my opinion.
finally someone else who thinks the same way i do about the '06. the a-bolts are good guns but i would personally like a remington 700. if the a-bolts were less i would definately choose it but they're a tad out of my price range. but heck yeah go for the 30-06. it's a great north american hunting cartridge... none better in my opinion for all around versatilitly.