You forgot the AX8 by Abit.
Anyway not a lot of people have tried the K8T890 yet since it's relatively new, and it's the underdog mobo chipset. The K8T800 did an outstanding job, and assuming that the K8T890 is just as stable as its predecessor (sorry if I mangled the word), and if you don't need all the didly doos of the NF4 (SLI etc) then it's probably a great chip.
I would give it some time before you buy though, so you can look at some reviews later.