Go ultra-light. 5' or 5' 6" rod. No more than 4 lb test.
This. I can't fly fish (yet) so I still use a spincast. I like the very light line. It shines for trout.
The only reason you'd want a heavier rig is if you needed to cast it a ways further up river a ways to let the bait/lure float back down. But then, I like fishing with waders and keeping things close enough to watch the fish strike. That's part of the fun of stream fishing IMHO.