I wouldn't run 6s on the Quark, nor an 8xl with 6s, way too hot. You would be better with a 5s and 9xl IMO. The Quark can handle 6s, but it's not very good. A 5s on 9xl would be good though, it's what I used to run and it worked fine.
"if you've got something to say, say it peacefully"