the f series in the s2k has more in common with the hseries than it does the f-series as we know them... it is based off of a hybrid of the two used in the accord-r in some markets called the f20b.

the feel that the SI will be upgraded as the rsx fades out and that a CRX will take the place of the previous si and the si the place of the previous rsx.

:edit:

and the work to be done to the k series would be the same ammount of work that was needed to be done to the h or f series to get it to work in a RWD platform... i dont see it as an entirely huge problem, just and engineering chalenge they will enevitably have to take to upgrade the s2k.