top - 50lb generic GSP
next down - 103lb Whiplash Pro 'Crystal' GSP
3rd down - 112lb Spider Wire (red) GSP
4th down - 30lb generic dacron (white)
5th down - 30lb generic dacron (blue)
6th down - 30lb generic dacron (orange)
bottom - 30lb Micron dacron (yellow)
I mostly use the Whiplash Pro, either in green, or more recently the 'crystal', either in 80lb or 100lb breakstrain.
The 100lb break strain Whiplash Pro GSP is still substantially smaller in diameter, as can be seen, that any of the 30lb dacron braids. From a practical viewpoint, at least twice as much of the 100lb bs Whiplash Pro can fit on any reel as any of the dacron braids.
For knots, I use a three-throw fisherman's sliding knot as a arbor knot onto the spool.
I make a large loop in the fly-line end of the GSP, using a triple surgeon's loop, the loop being large enough for the reel to pass right through.
GSP (aka gel-spun polyethylene) is often called just 'gelspun', and trade names for the generic stuff is often called 'Dyneema' or 'Spectra'.
I have never had any problems with Whiplash Pro (made by Berkley), but now prefer the 'crystal' (white) in either 80 or 100lb bs. I previously used, and still have on several reels, the green Whiplash Pro, but it does have a dye which comes out on your fingers as you spool it onto your reel.
Mike