For me cranks boil down to 3 main colors: Shad, crayfish, and something with chartreuse in it. Diving depth depends on where you are fishing. Below are the top 5 cranks I would go with.
Bandit= 100, 200, 300, sized based on depth you are fishing
Rebel Wee and Deep Wee R= can be found at Wal-Mart and are a highly productive crank.
Mann's Baby 1- runs about 12" deep if you really crank and hold your rod tip down.
Strike King 1.5 Overall the best crankbait to start with.
Rapala DT series= DT stands for Dive To so just pick the depth you are fishing.
There are at least 50 others I could recommend based on the situation but the above but you have to crawl before you run. I can tell you about the Tsunekiki Kohama Crank later.
Allen