Their all good, try and get hold of some that interest you , and work the action, shoulder the gun etc...
Bolt action is the best for hunting, keeps the weight fairly low , and these are accurate, and you can count on most of 'em.
As for caliber , 30 cal in std, maybe 7 mil in a magnum , these are minimum.
You can go bigger, but not required, and will make a good deer gun also.
If you got a deer gun , then a 338, 350, 375 H&H are all wonderful calibers.