Well getting a power male will be good OR as said a few good 2 gene females, I would suggest getting any banana yet as they are dropping fast being so easy to create, and unless breeding this year, youll start loosing value! MY best suggestion IF you do plan on breeding and have money is buy some nice Visual+Het (gene) females
Example
Pied Het pastel
Pastel Het pied
Pastel Het clown
Clown het pied
Spider het pied
(sorry i love my killer pieds/pied but many genes could be replaced with each other)
This is because with these you can get realistically cheap (if 2013/2012) and not at full breeder size.
This will let you get them to size for when/if you plan on breeding and with having visual +het females, you can have a Power house male 3+ genes and take him to all of them to create bunch of amazing snakes!
And since you said you are waiting i think getting females>males is much more beneficial in the long run. As you wont have to pay for the "size" factor of a female, where males are good at 500g (75% of the time) so it takes only a few months to get them there.
Best of luck!!!!