Ah, another Pennsylvania person. I live in Codorus. Paradigm's website gave me 2 hits. One was in Harrisburg (Anderson Audio, which doesn't look promising based on the website http://www.andersonaudio.com/) and Paul and Tony's Stereo in State College. P&T's is where I originally bought my Paradigms in 1994, so I ended up going back there for my Monitor 11s and Center 3. It's 3 hours away from me, probably more like 1.5-2 hours from you.
I can certainly recommend Paul and Tony's, but they don't have *that* much Paradigm in stock. They have the Monitor series of mains, the Atoms, the Center 1 and 3 (I bought the display Center 3 so maybe just the 1 now), the Surround 1, and a couple of bigger centers (the 590 and 690 I think) but no sig or ref product. They can probably order it, but if you go there wanting to audition the sig/ref lines, forget it. They do encourage you to bring a CD and audition the Monitors though. The 7s, 9s, and 11s are the only ones they have hooked up.