Just a tip:
As your casting improves it is amazing how "great" your fly rod becomes. I'd dead serious about this. I swapped lines, rods, etc. for a while when I first got into fly fishing and eventually I reached a level of competence that now, I'm confident picking up just about any rod and any line (within reason) and casting fine with it. You'll be there too -- just keep your current stuff and practice.
What I mean is that good casting mechanics trumps rod/line configuration.
That said, you might have minor preferences for rod actions and + or - 1 weight of fly line or something. That's normal.
Just keep at it!
That's what I do.