I have a 2 X 15" cabinet and want to add something on top. What do you recommend. 10" 6" Horn driver + horn etc.etc.... I am using this rig just for checking sound of basses I made, am making and will be making but not for a live gig. Bass type? All sorts. 4 strings, 5 strings, 6 strings, fretless..... I also have a crossover so I can go two or three way bi(tri)-amp. I think I don't need three way but tow way is enough. What do you think?