I think all open guns from majority of reputable builders can be reliable. However, unless you load your own ammo and figure out what works specifically with that gun I don't think any of them "new" are ultra reliable, as in don't buy a new one and go to a match with it. Might be hit or miss.
CK's are known to be super tight when you get the gun - lots of break in time. Also you have to plunk test your ammo to see if you should ream your chamber, they're known to be short.
SVI don't make 9 major anymore. Same thing though, needs break in - ammo trial.
My friends Tru-bore- had a spring binding issue, as well as he changed over to a 90 degree optic mount to aid in proper ejection.
My current gun is an Atlas Chaos - I had a spring issue when I received mine, and had to increase spring weight, now it's awesome.