Assuming the units are 8 ohms
Build four 2x10 cabs. A 4x10 is a weighty beast , and these days most ( maybe not all ) want cabs they can put in a carrier bag and take to gigs.
You could keep 2 cabs so you could have one 8 ohm cab for small gigs and two cabs for a 4 ohm ( assuming your amp can do 4 ohms) monster gig and sell the other two 8 ohm cabs. I think 2x10's will be easier to sell than a 4x10