Yeah, a 9 ft 5 wt is the PA standard fly rod for medium and large streams. 9 ft is a little long, though, for smaller waters. By getting an 8 or 8.5 footer, you have a rod that, even if it's not the perfect tool for every stream, is plenty servicable just about anywhere in PA.
While you can find very good rods at good prices, I would encourage you to get a half decent rod. If you get a crappy one, as you get better, it'll be useless. If you get a better rod, it'll always be a good rod for you.
Getting a good rod, though, doesn't mean you have to lay down mega bucks for a Loomis, Sage, or Orvis brand. Cortland, TFO, and others make very good fly rods at reasonable prices. They typically skimp a little on the aesthetics, but they fish just fine. Or, you can always go used. I agree with Fishidiot, you should look for something described as medium-fast for a beginner rod meant for all-purpose fishing.
As far as the reel, you can skimp a little more on that. For most "regular" trout fishing, the reel is little more than a place to hold line.
Buy a line, backing, and leader, and ask a reputable fly shop to set up your system. The backing and leader are very cheap. A fly line, though, will cost you at least $30 and the better ones run upwards of $50. Keep in mind that, with care, it should last you for years. Again, I agree with Fishidiot, get a weight forward (WF) floating line in a 5 wt size. As far as taper, anything that says trout or shows a picture of a trout on the box will be fine.
A wheel of micro shot, some flies, and some floatant, and you're ready to go!
