Looks like International has updated their HX series recently. The truck now has the standard cab used on the LT. I think the former HX was the last truck International had that used an older cab design. Options include the SFA HX520 and the SBA HX620. (Photos ain't mine)
The SFA and the SBA both look pretty sharp, though I'm partial to the SFA. It has the "Large Car" look. The wrecker version looks particularly spiffy.
I had assumed when the HX series first came out that the end was near for the 9900, and it appears that is so. The 9900 is no longer offered on the IH website, though it was just a couple months ago.
As a replacement for the 9900, I think it looks great.
Thanks for the info, I'll have to pay my local IH dealer a visit when one comes in and check it out.