I've had the Saiga 308 and the R1A1, plus a DSA SA58, or at least a rifle that was built on a DSA receiver. I'm not sure which. Of the three, I've been most happy with the Saiga. Accuracy is mediocre. I can get 1.5-2 MOA out if it provided I do everything just so, (handloads, cool barrel, rest), but most of the time it's a 3 MOA rifle, (factory ammo, warmer barrel, rested on blocks). Reliability is perfect. I've fired about 600 rounds through it so far and I've never had a jam. Price is excellent, but the mags aren't cheap at all. With an Ace folder on it, it's extremely compact and optics and accessories aren't much of a problem. Fit and finish are pretty good. You won't mistake it for a Browning but for a cheap AK it's impressive. The original stock is very cheesy however.
My R1A1 delivered similar accuracy, (maybe a little bit worse, but not much), with better ergonomics and scope mounting options. Fit and finish weren't as good though. Mags were dirt cheap and I never had a problem with them. I did have to open the gas valve all the way for it to cycle with SA surplus and it did jam on me a few times, but on the whole I would say it was reliable. I think it had a 22" barrel on it and between that and the fixed NATO length stock it was one BIG rifle. I paid $600 for it, so it cost me about the same as the converted Saiga, but with cheaper mags.
The DSA was the most disappointing rifle I have owned. I bought it used, but it was in perfect condition. Everything looked immaculate, the fit and finish were excellent, the charging handle was smooth as butter, and it didn't shoot worth s--t. It had a thin fluted barrel on it and as it heated up the shots would get higher and higher. If you fired 10 shots you would get a group 8 inches high and 1" wide. I tried loading the shells one by one, different cartridges and asked for advice over on the FAL files, but I couldn't get it to shoot, so I unloaded it after less than a month and used the money to buy a Remington LTR and optics.
Now I've read enough to realize that my experience with DSA is atypical and that the rifle may not have even been built by them, (their receivers all say SA58), so I would be willing to try another.