Looks like you found the Cobra as a good compliment, but for my input QMS, Meteor, Fuse are all great discs. The cobra was a bit flippy for me when I had tried it. The QMS I didn't throw long enough to make a good decision on, but it definitely held lines well. The Fuse is like the QMS but glidier, and yet for some reason I just can't get control of it.
So for me, for an understable midrange that turns, I'll use the Meteor. But for shots you want to put a specific line on, I'd have to go with a beat Roc for holding lines. My Roc isn't beat per say, and it holds almost any line I put on it. A pinch more beatness (which it'll never get thanks to the lovely plastic) would hold anything.