apc props
 

Tower has 20/8 and Horizon Hobby has 20/10.

apc props
 

I generally use APC props on 40-120 size airplanes. I like them - they're more efficient. I change props in brands, pitch and diameter ALOT in search of propeller nirvana , and the APC's usually come out the winner.

I use a couple of wood Zinger props because they are offered in multi-pitch and the APC's are not. I like the 13x6x10 zinger on one of my .91 4-strokes. I also like the el cheapo black plastic master airscrews on our flying wing planes, especially in winter. The flexibility that makes them a bad prop for some uses makes them just great for skid in belly landings where the prop is not always done spinning.

In really big props you cannot beat carbon fiber. Just my $.02