Thanks for the feedback on the ME lines, gentlemen! I'll look forward to casting mine (a full floater) when it arrives.
John, regarding the lines, the Delta Spey and the MidSpey are two different animals--the Delta Spey has a head length of @ 55ft (depending on line weight) while the MidSpey features @ 65ft head. I would classify the Delta Spey as an extended belly shooting head, while the MidSpey falls under long belly Spey lines (see my article "The Long and the Short of Spey Lines" on speypages.com). If you've zeroed in on Airflo and RIO products, then your choices for extended belly shooting heads are the Airflo Delta Spey or the RIO Windcutter. Choosing between them is a little like choosing between Glendronach and Glenmorangie--both are sherry finished, both are excellent single malts, yet each has its own character and appeal, and a preference for one over the other will be based upon...personal taste. The same with the lines. While both lines have a similar head length they have different taper designs and grain weights. I regularly cast and fish these lines on a variety of rods and enjoy them both. If you must make the choice of one line, the best thing to do is cast them both on your rod to find out which one you prefer. If you hunt around a little you might find a shop nearby that has demo lines available.