Since starting 8x10 about 10 months ago, I have used J&C Classic Pan exclusively; both versions of the 200, and recently, the new 400. Here's what I have observed:
First of all, I don't own a desitometer, so I can't rattle off of a bunch density, fb+fog values, or CI numbers. All I can do is report the results of the prints.
The new 200 can build a lot of density when developed in ABC Pyro. I found I as overexposing it by as much as 4 stops; dense as hell, eminently printable on Azo grade 2. Some have said from their densitomer readings that the 200 doesn't aloow for much expansion and contraction. My experience is counter to that when developed in ABC. If I were to continue developing it with ABC, I would rate it at 200 instead of 100 like I had been doing.
When developing with Pyrocat HD, the new 200 can be rated at 200, developed for 14 minutes and have a beautiful negative for Azo grade 2.
The 400 is wonderful. Sandy King, through his rigorous test, believes it has plenty of potential for expansion and contraction. I agree albeit with limited experience. The 400 speed is great, allowing for wind pertebations and using contrast filters. About 14 minutes in Pyrocat HD and it (again) does great on Azo grade 2.
Notice, with pyrocat HD, N development time is about 14 minutes for 200 and 400. Nice! Several others have noted the same thing.
The final sealer of the deal is the price and J&C's service. I've always loved Tri-X but Kodak's pricing on their 8x10 sheets is outlandish. J&C ships very promptly; I usually recieve my order with 3 days, sometimes in 2 days.
I have not seen a reason to use any other films yet. My current plans are to continue developing with Pyrocat, wringing out all I can from both the 400 and 200.