There are some great names listed so far, but Saucon Valley's Old Course and (newly renovated) Weyhill course should also be included. And it does not hurt to have a sold third course, the Grace, which once upon a time had a top 100 ranking.
Confidential Guide ratings Old 7, Weyhill 6 (would be higher if he saw it, IMO) and Grace 6.
I would rate them 8, 8 and 5.