If I had it to do over I'd have went with the dual imputs on my m80's.Beause the amp I am using is rated 340 watts into 4 ohms with dynamic power of 640 watts at the same 4 ohm impedance and 850 watts dynamic into 2 ohms, I felt I didn't need it.the dual imputs would have provided me with down the road amplification options.
For my thinking a perfect driver basket would have absolute rigidity and be totally transparent to airflow.Nobody's building it.Haven't seen a lot of driver baskets, but the one that really got my attention was was the oval driver on the polk lsim.I've got steel baskets in my speakers.Like was previously mentioned the sonic benifits of the upgrade for these speakers aren't there, unless you are pushing them right to the edge.