BEST SS Prop on Tracker

[Seabee13]

Changing out the prop on Tracker Pro Team 190 TX w Merc 115 ProXS 4S with the dealer...looking at Trophy Plus 4blade , SpitFire X7 4blade Lazer II 3blade, dealer recommended Trophy Plus 21P....seems a little high on the pitch I would have though more like 17P...Anyone running any of these props? if so what size and max rpm...Also on this boat anyone running a jackplate, is it worth the $'s, comments please...Thanks for your time Seabee13