I have a Hardy Mach spey-9-F and use it on my sage 9140 giiie. It's an integrated line with a 55ft head, but I cut off slightly under 3ft from the tip to give it a little more turnover power with polys. I mostly use it with a 10ft floating poly for T&G casting, but have used it with up to a slow sinking poly and T&G casts (and/or double speys). One of my favorite lines, it resides permanently on my speyco reel that Tim built to 17.4oz empty to balance the 9140 on the swing. I like the running line on this better than the delta's, not as thick and a little slicker. That's about all I know, HTH.
For me, the glass is neither half-empty nor half-full, but rather twice as big as it needs to be.