great post. i may go try my luck on a g37 journey coupe at crest infinity in plano, tx.
they have a couple of 2011 left hopefully 2012 models are similar.
i went to take a look. they got close but there was a big miss on the residual. the spreadsheet shows 66%, but they only have 59% on a 3 year 12K mile lease. 66% residual was for a 24 month.