NY State - Jim Hart does excellent work and the several barrels he's put onto my buddy's rifle have been excellent shooters.
PA - Hammonds rifles in York, PA but be forewarned, he is reputed to be "moody" with some customers. I've never had an issue dealing with him whatsoever. Again, his work is excellent and several of his rifles hold record book lines as well.
I put a Badger Thruster on my 6.5CM...I also like the Little Bastard. There are 100s of options out there - depends on the look you're going for and your wallet.
I don't have any info for smiths in those States, sorry. I would recommend Mark Gordon at SAC (he's in Ohio) if you want someone close to you.