I went through the same decision process myself a couple weeks ago. Decided on a Unicomp, since I have no significant nostalgic desire towards a Model M in general (but I do want an M13 and an SSK).
I wanted an all black / blank Unicomp, and there were several paths to get there :
($102), $79 for a black classic + $23 for black keys, or
($89) for a blank black custom, or
($103.50), $59 for the wildcat + $23 for keys + $20 for case + $1.50 for LED cover
You can tell by my avatar which route I went...