Comet and Cointaker both have great products. I find Comet a little cheaper.
I only buy warm frosted 2-SMD. This bulbs works for everything. The warm white does not wash out colors on plastics and playfield. Do not use color LEDs- they look terrible and you will just waste money trying to stock all the different colors. You will wind up with a bag of each color just sitting there.
Buy in bulk- 100 count bags will save money. Seriously- keep it simple.