Hi guys

I'm helping to organize the sound and lighting for my sister's wedding for ~170 people (room holds 250). I was initially thinking that getting two 15s and 2 subs would be good, but then I saw that the venue has 30' tall ceilings. Would it be better to move to a 4 speaker setup with just one sub (considering the sub is only really needed for the dance floor)?

I'm thinking getting EV 15" powered speakers with matching subs.

Thanks!