Well known and fantastic funk mover here, Magnum's "Evolution". One of the few Philly records that I've actually found in the city limits. "Evolution" has crisp drumming, great horns, plenty of bass, and real nice guitar work in the background. Also, check those congas adding a bit of texture. I could leave the bit of guitar solo that shows up in the middle, but the rest is so good I can forgive it.
Have a listen here, even though it's not the best sound quality.