What tower speakers?
You couldn't run four tower speakers if you bridge, obviously, but you could run 2x rev410s on 585w ea, and that'd sound good. Can you run four channels bridged to two channels and then leave two channels full range? If so, what about running it like this:
1&2 bridged: rev 410#1
3&4 bridged: rev 410#2
5 & 6: 4x interior speakers in parallel @ 2 ohms
1&2 bridged: sub voice coil #1
3&4 bridged: sub voice coil #2
5 & 6: 2x interior speakers
That would give you 585w to each tower speaker, over 1100w to a sub, and 145-185w per cabin speaker.