I'd say get the cheap Romanian AK in 7.62x39 first, then if you like them go for "better" later. My Romanian shoots as good as my Polytech or Norinco or Clayco or Madii, none are tack drivers -- expect 6-8" groups at 100 yds with most factory ammo.
I just got a milled Arsenel USA, haven't had a chance to shoot it yet. It is clearly better looking than all the rest I have, but I'm not really expecting it to shoot much better. There was a show on the History channel "AK vs. AR" showing the plus and minus of each. Most telling was some slo-mo video images of the guns firing -- the AK flexed so much its amazing it doesn't just break in half! With the barrel flexing that much 6-8" groups seem pretty darn good!
I just got some Silver Bear "Match" 7.62x39 ammo. When I get a nice calm day I'll try all the basic AK and SKS variations I have and see if groups get closer to what US shooters expect from any of them.
--wally.
Edit: Forgot to mention, I don't advise ording a Romanian AK sight unseen as many have crooked rear sight block or front sight. I had to look at half a dozen to find the two I ended up with (one normal stock, one side folder). I really perfer the Romanian wire side folder stock. Its solid, althouh it looks pretty crappy at first, it really works well. Normal AK stocks knock off my hearing protectors when I try and get a check weld, the wire dips down out of the way and works the best for me. Beware of the Romanian or converted Saiga with the "US" plastic side folder. The stock looks good at first, but is very flimsy when extended -- much worse than the Fiberforce side folders for the SKS.