Some 6 weights act likes 6's and some 7's act like 8's. Heavier grain Skagit lines eat space on a reel. I think you would do well to chat with a good shop in your area and figure out target species, rivers you want to fish, etc.
I'm a little biased; but, good advice, and perhaps a little more money up front, will definitely save you heartache and frustration in the long run.
Have no idea what your budget is but 'Google "SpeyCo"fly reels. These are bullet proof and you could pound nails with the things. If you're not a member of the SpeyPages Forum sign up, they frequently come up for sale. As does a heck of a lot of other first class equipment.
I have a 3.5" Lamson Velocity nickel in the classified...pristine condition...no scratches or dings for roughly 25% off. these are beautiful reels, almost indestructible open warranty and great disc drag. This one is just a little small for me although it is rated for a 9wt and 200 yds of 20#