I would suggest to get the (more expensive) F2AS (with DP-12) or the F2-SB (DP-3) as the cells are easier to repair, the DP1 (F2-Photomic), DP-2 (F2-S) and DP-11 (F2-A) all use CdS cells which are harder to repair, in case of a breakdown......
The F2-SB is of the non-Ai era though if you don't mind.....
HS