It really depends on how much you want to spend.

Cheap options:
Pastel - will make bees and supers
Pin - will make spinner and lemon blasts

Mid range options:
Lemon blast - spinner blasts and killer blasts
Bee - more bees and killer bees

Expensive options:
Pastel Lesser - Queen bees and super pastel lessers
BEL - lesser/mojo bees and pastel lessers/mojos

There are a lot of options depending on personal preference and how much you want to spend.