"...would make it a somewhat shakey hunting rifle (right?)..." Nope. You don't need 1 MOA for deer. 2" to 3" at 100, consistently, is sufficient for deer hunting.
"...a good starting brand of M1As?..." There's only one 'brand of M1A', Springfield Armory Inc. Everything else is a semi-auto copy of the M14. Mind you, so is the M1A, but 'M1A' is a registered trade mark owned by SA Inc.
"...have to find a mounting system for a scope..." Lots of 'em. Some better than others and none of 'em exactly cheap.
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