+1 to all of this.
more tops than subs is backwards, as it typically takes more speakers, and always takes more power, for low end to keep up with high end. also, unless they're specifically designed and very carefully arranged, multiple top boxes next to each other sound terrible, as they cancel each other's frequencies and turn the sound to loud mush.
now, are we talking about some sort of internal passive crossover in these subs? (i.e., speaker cables run from amps to unpowered subs, and from subs to unpowered tops?) if so, you're losing a lot of your output power.
a real crossover before the amps, so that the tops only get above say, 100Hz and the subs only get below that, each from their own amp channels, will give you a lot more clarity and power.
and running an amp at 2 ohms/side is not "stretching its legs", it's slamming it to the wall! better amps can handle it, but it's still hard on them.
Thanks for the tips! I'll try some of this. WE do set up BIG, spread out a bit outdoors mostly.
Regardless..most seem to think a few mains and a sub or 2 would cover the initial posters needs. He has lots of options.