i would say its gonna be personel choice, i know i like the really slow reels 3.8:1 for big deep diving crankbaits, the rest of the time i use 5.3:1 reels, i have tried a fewin the 6:1 area but for me the 5.3:1 is about ideal

it might be handy to have a high speed reel for buzzing, and it also gets the line/bait back in a little quicker on a dead cast

good luck