I don't think one rod does it all IMo,becuase Pennsylvania has a vast number of situations and water sizes to deal with. I prefer 7'6" or 7" 4/5 for smaller to mid size water. For nymphing/soft hackles and wets/as well as dries on big rivers or mid size streams with more wind and open canopies its a 10' or 11' rod.
So right now for me its Hexagraph 7'6" 4/5,or my first rod a Cortland 7'6" 5 wt on small to mid size water,and on bigger water i use a Cortland Brook 10'4wt although i plan on getting the 5wt 10 footer before trout season,also my Lamiglas 10' 6 wt or redington 11' 6/7 wt for nymphing ,softhackles and wets,streamers,Czech Nymph or Euronymphing,and of course the scrappy smallmouth.
One rod will never get by in my house i have been to the under gunned or wrong gun situation and have corrected that now.Try highstick nymphing out on Spring Creek with Dave Rothrock,and using a 7'6" 5 wt then try a 9 'er .You find out real quick what works and what cause a lot of grief.I prefer to keep my life sans Murphy,no offense tim if you read this im speaking of Murphy's law ok.
Tight Wraps & Tight Lines
Rick Wallace