I use a Sage 10ft 8 wt xp. I like the 8wt because it will handle salmon or steelhead. Even though I dont really go for the salmon any more. For steelhead I'm sure a 7wt would be just fine. I think some guys even use 6 wt rods but I think you would have to be pretty handy with a rod if you go that lite.
As far as flies go it depends on what time of the season you go. Egg flies and black stone flies with different color hot spots are always good. For reals and line I use a Ross bg4 with rio steelhead floating line. And I also have a lamson valosity with a running line for swinging flies. You can also attatch A sink tip and swing bigger flies like egg sucking leaches or wooly buggers.