Re: Orvis Battenkill mid arbor V (7wt question)
Better to go by how much capacity you need to hold your desired amount of backing and your particular line than to rely on the manufacturer's standard rating. 200 yd of 30-lb backing and a long DT floating line will need a bigger spool than 100 yd of 20-lb backing and a shorter sinking line.
I have a BMA V with a WF8 saltwater line and plenty of backing on it. No problem. If you're going after fish that will take you deep into the backing, it's ideal. (In fact, it came from Orvis already set up that way as part of an 8 weight outfit that was provided with an Orvis-sponsored "learn to bonefish" trip my father took. So even Orvis is flexible about the line rating.)
I also have a "brand X" no-name mid-arbor reel that is slightly bigger than the BMA V but rated as a 7/8, so it's all pretty subjective anyway.