Good luck with your shopping. We pulled our first HTT with an '03 Expe 5.4. You can see in my sig that is was an X23B.
My sticker has the same weight ratings you post.
My weights from the CAT Scale:
TV only: Front-2860 Rear-3100 TT-0 Gross-5960
TV/TT w/ Bars: F-2700 R-3800 TT-3880 G-10380
TV/TT no Bars F-2520 R-4040 TT-3820 G-10380
My analysis says I had 600# on the tongue with the ideal range 442-663
These weights were loaded with the Bride, myself and the 11# wiener dog aboard.
My surprise was rear Axle was 3800 my Rear GAWR was 4128.
I was 328# shy of the Rear Axle max.
Add another couple and their luggage and I figure we were overweight.
Our tow experience was good. The big trucks pushed us around a bit but it was manageable. The 5.4 did an "adequate" job but I never ventured into the mountains. The MPG was not impressive as we never saw anything better than the high 9's.
We were 4420 loaded (I don't have the sticker weight any longer but I imagine the TT GAWR would be similar to the one you're looking at). If we'd loaded near the TT max weight we'd have been over the TV's limits.
We loved the 23B (lots of folks on the forum have them and all seem to share my opinion) but we bought it as an experiment and planned on an eventual upgrade.
It sounds like you've already weighed your TV which is an excellent start.
Plan your weights carefully and don't listen to the salesperson who will tell you that the Expe can pull anything on the lot.
The CAT Scale is your friend.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks