The AR--- As far as the crapping what it eats , yeah it does, but It doesnt matter. You can fire thousands of rounds out of that thing and it will keep on tickin. It needs a shot of oil say every 500 rounds, but the Saiga aint gonna touch the Ar for accuracy. Yeah the Saiga is cheaper, there is a reason for that. They got a big "KACHUNKA KACHUNKA" machine that stamps them out, unlike the Ar's machine milled receiver. I know people that have 8 or 9 SKS's and they all have reliability issues, granted they dont clean them but " once a year weather they need it or not" I pretty much quit cleaning mine until the groups at 100 yards open up to about 1.5 - 2 inches, then it needs a cleaning, Id say 500 rounds. It also does depend on the ammo you are using. I handload mostly everything for my Ar, other than that I use federal stuff which is very clean, Monarch, very very dirty, is no longer welcome in my AR, and Wolf has never been invited. The Ar's are the best out there, for most of us folks.
As far as 30 carbines, they are good 2 I got 6 of them, But ammo is friggin ridiculous for them. I saw a Remington 50 round box at wally world for 37 dollars, which is about the same as 30-06, for 50 rounds of 30-06.