I guess if I really need the extra umpph then just get use to subs and get the M60's.

They other thing is if using a sub, what would the sound benefit be in even upgrading from my M80V3
if the only upgrade is a tweeter with bigger heat sinks, well I don't run them loud enough to even need this heatsink

Anthem MRX520
M5HPv4
VP160HPv4
QS10v4