what should i do?

i'm running 3 12 MTX 8000s w/ an xtant 603x...it looms.

but i got a friend at work who's sellin his jl 12w7 and an xtant x1001 w/ a monster cap...should i go w/ the 1 JL or stick w/ the 3 MTXs?

any input would be appreciated.