I use a very fast sinking line, a light sinking line and a floater.
If you need to really get down deep the RIO Striper DC is a good one. 450 is about the max I can handle on a stiff 10wt.
I use a really light (300g) sinking line rather than an intermediate because it loads faster and cuts through the wind. Wonderline there.
I like the Wulff SW Triangle Taper for a floater.
I have a number of intermediate lines and hardly use them at all anymore.