Yup, after extensively watching Jeeps go over technical terrain in Moab, the old carbuerated CJs routinely out-performed the YJ. For whatever reason, the leafs on the front suspension on the YJ would "float/bounce" over rocks and would routinely lose traction. I'm not exactly sure what the difference is in the front end between a CJ7 and a YJ, but it was there, and the YJ was on the bad side of it.
The TJ with all coils (finally) matched the Defender and it's off-road prowess was vastly superior to any jeep prior. Jeep didn't screw up in 1997, they created a legend (even though I DESPISE the TJ interior).
The JK is starting to prove itself, the Unlimited as always been excellent (because it really has no prior competition), but many of the die-hards claim the TJ out performs the short-wheel base JK. This is heresay on my part, as I have limited experience with the SWB JK on technical terrain.
Back to my thoughts (for what they are worth), I would hope pricing is no higher than $50k, it would make it realistic for me, although I'd still probably buy used.
It is nice that all of the rumors on the web concerning the new Defender point to a utilitarian off-road vehicle. This is much improved from the mid 2000s rumors of the DC100 soft-roader concept being all that we had looking forward too. The scrapping of that concept gave me hope for the brand.
Let's just hope we can fit 16" wheels on the thing and aren't stuck with 20" crap due to over-sized calipers!