Nightcrawler
The PSL does very well at 700m if I use good ammo (7N1) and shoot from a bench. It also does pretty well with Czech silvertip out to about 500 or so, but 700 becomes iffy. 700 is also the farthest I have fired with it due to range space, but it's probably my practical max range with this rifle/scope combo.
I had ALOT of trouble with this rifle when I first got it and almost gave up. I couldn't get a decent group and couldn't zero the scope. I'm glad I stuck with it, though. Once I learned *how* to shoot this rifle and learned how the scope works I'm really happy with it.
Edit: missed the part about the Saiga. I don't own one, so I can't really say which is better. I'd imagine they're about the same considering it's the same basic rifle in different clothes. If anything, the Saiga might perform a little better once the barrel gets hot but that's just a guess.