I agree with flyfisherjoe-

For most coastal/saltwater fishing you are going to occasionally be throwing rather large flies and/or fishing in high wind. A 8 weight on up might be a little more versatile. For those calm mornings on the flats when the water looks like glass and the fish demand a super sensitive presentation, the 6 weight can rock.

Also I would worry about the corrosion of the reel. It will require a very high level of maintenance to stay in good working order. I have a Cabela's reel that is great for my freshwater fishing but I would not be caught dead using it in the salt- the reel would be destroyed in no time.