You asked for opinions so here it is. I think 10's hit tighter bass than 12's. on the other hand 12's are slower bass more ripple in the car. I like slow lazy bass thats not always loud thumping all the time 10's react quicker and hit constantly. I run 2 12's and i am gonna go with 1 18 cause i like it slow and low.

The power difference is not that big of deal they r real close anyway.

Now 3 10's on the other hand i cannot say anything bad about cause i have shattered local records with 3 10's sealed and it caused damage to my car big time.