Well, I am on my third AK.
Here is what I have learned about them.
I started out with a Robinson Armament VEPR K .223. It was dead reliable and really accurate for an AK. I shot several 1.5 inch 100 yard groups with it from a hot barrel and using only sandbags for support while shooting prone. It was a good gun, but I found the balance to be virtually nonexistent, so I got rid of it.
I then got an SAR-1. I bought it from an online seller for around $350. It was a little rough when I got it. The bolt would try to jump out of the rails when the action was cycled by hand and the sights were slightly misaligned. The action wore in after about 60 or so times of being cycled before I went to try it out. It worked just fine. Eventhough the sights were a little off, the gun zeroed alright, so that was no big deal. The only thing was that I was a better shot than the rifle would allow. It got around 6 to 8 inch groups at 100yds. That bothered me, so I sold it.
I now have an Arsenal SA-M7 Carbine. It is finished much better than the SAR and about the same as the VEPR. It weighs about as much as the VEPR did, but the balance is between your hands, so the gun is still fast handling. The milled receiver makes it heavier than the SAR, but only by about a pound. This does reduce the already minimal recoil of the 7.62x39 a little. The round doesn't really kick in the first place, but an AK does jump around. The milled ones jump less.
Mine came from the factory with the rear sight slot milled out of square. I called them, and was informed that the gun would need to be sent back to be repaired. I didn't want to be without the gun at the time, so I installed an RPK style rear sight on it to fix the zero problem cause by the sight being off. The gun will do 3.5-4 inches from 100yds.
It is now good to go. I sometimes carry it with a 30 rounder in while walking in the woods.
In summary, the VEPR is reliable and accurate. The SAR will be reliable, and may or may not be reasonably accurate. It probably won't be as pretty, but it will work.
I feel that the Arsenal is the best compromise between the two.
You gotta decide what you need based on what you want them for and how much you can spend.
Personally, it wouldn't be a bad thing to have a couple SAR's put away for a rainy day.
And some ammo and mags.