^^
Yeah, I've been eye-ing that Legatia for quite some time now -- mostly for installation ease.
I'm not quite sure it'll like the 140 watts or so I'd be throwin at it... Unless it were rated for 70 watts a 8 ohm.. Hm...
You should try and fit the Morel's -- just for shits and giggles. You'll be the 1st person to have 10 inch mids and a 1 inch tweet.
Ever given some thought to modifying Q-forms to fit a pair of mids? Possibly some 5.5"s or 6"s? I'm sure that'd be a helluva lot more flexible as far as a 3-way setup goes.
If not, you really should fork over the few hundred bucks for fiberglassed kicks -- you'll thank yourself later on.