These two guns really aren't even close to each other, it's not Apples to Oranges it's Apples to Eggplants.
Never mind the fact that the SOCOM is currently selling for more than twice the price ($2,100 vs $900), they fill completely different roles with different rounds.
What do you plan to shoot with it? Small animals, large animals, dangerous animals, people?
The .223 Rem is a fine round for shooting coyotes and (defensively) people, but I wouldn't shoot any medium game with it. That wouldn't even be legal where I live. But it's much cheaper than .308 Win and as a result you can practice more, and well placed shots are important especially with defensive shooting, the Mini-14 is also lighter and easier to handle and is going to be easier to take into the field without resenting it.
The .308 Win is going to be a great choice for medium to large game, but the M1A is a very heavy rifle and hauling it around in the bush stinks. It's also expensive, and only getting more expensive to shoot .308 Win and thus practice will cost more, and you've already spent more on the rifle.
If you think you'd like to practice more and have a lighter rifle an AR-15 is probably a better choice anyways. The modularity will allow you to move to a larger round later if you like and they tend to have a better reputation for reliability and accuracy. However you can expect to spend a more than $900 with the Obama rush.
If you have something against the AR-15, perhaps a PTR 91, an "AK", a Kel-Tec, a FN FAL or some other rifle?