For what its worth i use:
14 footer, 42g Rio AFS
12'6", i have bought a few heads to play about with, guideline power taper 31g, airflo skagit 510 grains and Mackenzie g2 32g. (these may or may not suit the rod but for the price i paid they are worth a throw)
Also have a DT 9wt for the 12'6" which was a pig to cast but when i did get it right it was fun and quite satisfying. So i guess i would consider trying a spey line as i don't want to rule anything out with out trying it.
Dan