I too am pleased 10cc are at last in PA. In the early '70s they were probably my favourite band, certainly from around '72 - '74, when my interest in Genesis and Yes and Floyd put them ahead.
Always loved the intelligent, witty lyrics, superb production, and beautiful harmonies of 10cc.
All four musicians could write, play, and sing. They all knew each other well long before the formation of 10cc, were session musicians, had appeared in the charts as Hotlegs with Neanderthal Man (Godly, Creme and Stewart anyway) and had had a successful album released as that group, with appearances from Gouldman as well.
I always preferred them to Queen (even though I enjoyed the early Queen period) and agree wholeheartedly that they belong in the art rock genre.
Sheet Music is probably my fave album, but The Original Soundtrack runs it close. Deceptive Bends, How Dare You, the self titled debut and Bloody Tourists were, and are, all fine albums.
All in all, they are a fitting addition to this site.