I was going to say the level 5's for sure until I saw 1700rms each, My level 5 outpreformed my buddys 9512 in a direct swap in his car on 4Kw.
I have still never been fortunate enough to play with a HW or a SHW
Over time yes...
It is only a temp solution until you can replace the speaker. The sillicone method can be done multiple times as long as you clean the old stuff off the cone berfore re-doing it.