Live use of multiple speaker cabinets

[CurtWash2]

Hello I have a Band and we recently purchased 4 SR4718 18 inch subwoofer cabinets. I want to use them 2 to a side as stage FOH speakers. What would be a good match for top cabinets that would allow for a great deal of coverage. I also would not mind having 2 cabinets per side for the tops but I do not want to get into comb filtering where the sound is bouncing around and sounding funny in some places. Anyone done this before.

[lgvenable]

4732's or 4732x's ?

I'm running dual sub 4719 w/600 wpc into each speaker, and a DIY 2245 w/600 wpc into it. I've got the parts for the 4732 and am preparing to build them.;)

http://www.jblpro.com/srx/srx_product.htm