The 12X6 is just what i happened to have around the house. The manual says that it can handle a 13X6(so i figure bigger prop, more thrust). Next time i go to my lhs i plan on getting a wood 13X6 just because i think that i would look good with the custom cover job i just finished on my Tiger 60. Are there any brands of prop that i should look for? Any i should Avoid?