Searching through a bunch of various 6's looking for a mid upgrade for my 12/6 + 12only shortstack and stumbled across this:
Faital Pro 10FH500 10" Speakers - Faital Pro 10FH500 mid-bass, bass guitar speaker and subwoofer 10" speaker that has a lightweight neodymium magnet - Faital Pro 10FH500 1,200 watt 10" efficiency of 96dB SPL woofer for all high power bass application
It certainly plays loud enough, the little 2.5khz dip may translate into not being too twangy for some folks, and off axis response would be a small improvement over a 6. The 5" to 6" difference doesn't sound like much but it might be just enough to fit this in place of the tweeter in some of you guys woofer + tweet cabs who find yourselves turning the tweeters down/off due to harsh sound. It's listed as a 12 ohm driver as DCR is 7.2 but that's not really that far off from some drivers listed as 8ohms, it just means a little tweak of filter part values. A "salad bowl" subchamber would complete the mod. Response runs high enough to appease slappers but not too high as to upset you OD/grit/distortion guys.
Anyway, pretty impressive little 5" mid that's high in the running for my little, loud rig.
Edit: I don't know why the link looks like that but it'll take you to the right place, the Faital Pro M5N12-80.