eh
bear in mind these are my personal opinions, and since the OP asked for opinions, here are mine (regrettable to many, i'm sure).
M1A SOCOM I & II: these are POS. 308 in a 16" barrel? that's a gun that NEEDS a longer barrel; the shorter one really reduces the effectiveness of the 308. and have you lifted that sucker? weighs a TON. now add on top of that some doodad on the foreend, some doodad on the top rail... a full 20rnd mag... and you now are lugging about a concrete block. i'm fairly muscular, and I was terribly repulsed by the socom. oh, and it ain't no tactical rifle either, despite what they want you to believe, given that the mags require two hands to change (and break profile).
M1A: Good battle rifles. I think they're awesome. Still weighs a ton. Don't forget that this rifle was designed for troops that have the ability to call in artillery, airstrikes... tank support, lmg support... weight is not so much an issue when you have five hundred men backing you up in a slow and steady advance. I would not relish carting this around in a disaster, especially since the unmistakable shape of the gun would quickly tell everybody around that i'm a good person to rob for my gun. It's also, like the socom, abominably expensive. the body armor on you is better than the zero-g suit that you've got on layaway...
cal-fal: the "dust cover" guns are high suspect imho. however.. if you are lucky enough to get a REAL fal in CALI, then have it pinned so that the mag is non-detachable, and you're lucky enough to have one of those belgian fals with the stripper guide integrated, you have quite a fine weapon (or even if you have a fal modified to have the guide). a friend of mine at burro canyon has one of thse. i had never fired a fal in my life before. i picked it up... and 4 out of 5 shots killed bowling pins set at 100yds. that's pretty good (for me at any rate)
cal-ar: YUCK. unless you plan on taking that cal-ar home and (illegally) removing the retaining pin so you now have a full ar in the safe. in which case you have one of the finest battle guns in the world.
cal-ak: yuck, and quite possibly an unsafe gun as well. aks weren't designed to fire with the top exposed like that.
mas-49: grenade launcher is integrated. cant' remove it. Destructive device under ca law. can't have one. (darn)
sks: stricty a minute of big bad wolf at 100 yards gun. mediocre accuracy, not light, non-detach mag (but very reliable with stripper clips), pretty crappy sights. yet still - a reliable gun, a decent and common fighting round, acceptable in size, and heck, you have that bayonet if things really get hairy. it's also cheap enough that you can buy one for your girl or kid. bear in mind that to me the sks m59/66 is NOT under this opinion... they are far too heavy and long. but still, better than a stick and a rock. and sharing the stick.
cz-52 she: basically an sks. if 7x45 were more plentiful, i'd say this is a better sks.
that's some of my opinion. ok, now flame away, i like it hot in here.. =)