My two males that may end up "sharing" some girls this year are my bumblebee (who has already proven himself as an enthusiastic breeder) and my pewter. Both a bumblebee and a pewter will give you a shot at super pastels if bred to a pastel female, and the pewter gives you a shot at the sterling, which is one of my favorite morphs
A lemonblast would be another good one, and in a similar price range to the above two (eh -- maybe a little more for a good one) ... Still have a chance for the super pastel, plus killer blasts ..!