Darin, welcome from Afghanistan. I have fond memories of Philadelphia, was stationed at the Philly shipyard back in 77-79. I also was married there in the northeast at Holmesburg.
After I left Afghanistan the first time in May of 07 (after purchasing my Rocket in March) my wife and I went on a long overdue vacation and visited a lot of friends and members of her family in Philly, Bristol, Fairless Hills and in New Jersey (she's a Joisey girl...Pennypack area of Willingsboro). While there I visited the dealership in Manyunk and it seemed like a decent dealership, as you said, they sold nothing but Triumphs even bought a t-shirt there (the blue one with Manyunk on the back), unfortunately I cannot help you as far as saying how their service department was.
Good luck, enjoy your ride and be safe.
Dennis
33 dtg KAF
38 dtg Dubai
39 dtg Home
60 dtg Ray's