I went to York for the first time today, and I gotta say, it was underwhelming compared to the hype. Chantilly arguably had some better deals than I saw at York, and I spent most of my money with Dennis Todd anyways... who's also at Chantilly. York had a better selection of older rifles, but that was about it.
This is not to say it's a bad show, but I would not say it was leaps and bounds better than Chantilly.
There's a decent chance I'll hit Harrisburg this year, too, as I have a friend who really wants to go. Just seems like driving 1.5 hours each way to go grab some mags at over-MSRP pricing isn't really the great experience it could be.