I have the 18695CU ... and its great! Although, I'm going to upgrade the HDD to 60GB and upgrade the battery from 4c to 8c.
In my opinion ... get the 18695CU or W7TABLC. Although, the 18695CU only has a 40GB HDD, 4c battery and Intel 2200BG Wireless.
Both W7TABLP and W7TABLN are missing a Fingerprint reader, and W7TABLN and has no integrated wireless.
It's really your call. Depends on what you need (and maybe want =P)