If you had the following:

1Dx, 1Dx, 1D3
16-35/2.8II, 24-70/2.8, 70-200/2.8IS, 85/1.2II, 300/4IS

And you were considering the following lenses:

Zeiss 15/2.8, 100/2 Makro, 135/2
Canon 35/1.4, 135/2, 70-200/4 (non-IS), 200-400/4&1.4x

What order would you buy them? What other lenses would you squeeze into the sequence?
How would the $80 mail-in rebate on the 70-200 and/or $100 rebate on the 35/1.4 and (Canon) 135/2 influence your sequence, assuming the rebates end on 3/31/14?

Figure you deposit $500 to $1500 into the lens fund twice a month, there's $2500 in the pot currently, but the pot needs to be emptied by the end of the calendar year.
Factor in a July cruise in Alaska (though rentals are already reserved for the relevant items listed above), and an October "Peter Read Miller Sports Photography Workshop".

As much as I want the 200-400, I don't know that I can get it in time for the July cruise. The rumor mill somewhat suggests the 35/1.4 is getting "mark twoed" soon. I think buying the Canon 135/2 and the Zeiss 135/2 is redundant, though my wife may enjoy the Canon if I get the Zeiss (she has a bag of gear totally separate from the list above). That said, I think buying the Zeiss 100/2 and the Zeiss 135/2 may end up redundant as well. The 70-200/4 (non-IS) is intended to give me an inexpensive (and much lighter) outdoor sports option.

Thoughts? Comments?