Consider the HK91?
I have a DSA SA58 and I really like it. I had to fiddle with the gas adjustment so it would eject Black Hills ammo reliably, but it is OK now. On the other hand, it never had any problems with Portuguese surplus .308 - Besides, I decided to use the Black Hills only on my Rem 700P.
I also have a Heckler and Koch HK91. It has always digested every type and brand of ammo with ZERO problems.
The bolt of the HK91 is more difficult to learn to disassemble, but once you know the trick, it can be done extremely easily and fast. No tools (even a screwdriver) are required to disassemble the HK, including hand guards and scope mount, (original and ARMS claw mounts).
The only thing I don't like about the HK is that the bolt does not stay open on the last round. But if soldiers all around the world get by without this feature, which not all military rifles have, then I can as well.
Accuracy-wise, with the Port ammo, from the bipod and just my shoulder for back support, and shooting relatively quickly: the SA58 is about 2 MOA, and the HK91 is 2-1/2. When I take my time, I can knock off about 1/2 MOA from either.
Costs (approximate): HK91=1850-2100, M1A=1500=1700?, SA58=1350-1550, Cetme=300-400.
If I didn't know what the circumstances were, and I were forced to grab just one, it would be the HK91.
Although I do not own a Cetme, I have friends who do and claim that they are very reliable, and their accuracy is acceptable. Caveat: there are many 'sources' for Cetmes.
Alex
BUT - - If my wife had to grab just one rifle, she would take our Colt AR15 HBAR; and that's fine with me too!