If the only off spring that you would consider keeping is a morph female, then have you considered putting stipulations in the contract to cover if there is only one. For example if you use the champagne and the result is one 1.1 champagne and a few normals, then he is going to want to pick the champ girl with the first pick and that will be the only snake in the clutch you will want. That sets up a senario for disapointment and/or resentment on both sides. If beforehand you agree that you get a champ girl, but then offset the deal as needed with more than half the snakes and/or some cash going to him to ensure that the deal is even handed, you are much less likely to have hard feelings at the end. Otherwise you will have to kill the odds for everyone to be truely happy.
As to which male to go with. The Champ and butter bee would both give you pretty snakes that have good genes to breed later on. A female pastel het pied or pastel OG would both have great genetics to breed, but will not be as pretty this generation. It all depends on what you want to produce and male you will be getting in a few years to breed to the female you hope to get now.