Little update, I've been working on the XO for the last week and I think I'm quite close to where I want to be, I've been using a combination of REW, Omnimic and PCD, as well as changing component values and measuring/listening. Slopes are 18db around 1500hz, with the .5 rolling off at around 250hz 6db with a 4.7mh inductor.
I wired up both speakers (which measure almost identically) and got to listen to them in stereo today, fun!
First impressions very dynamic and sharp, lively, smooth top end with no sibilance, and still has air and sparkle. Bass rolls off starting at 60hz but above that very fast and sharp bass from these pro 8" drivers. Probably never going to have that refined Scan Speak sound though.
I've been listening to my reference tracks as well as the MWAF tracks (man that Lorde song is a doozy!) and am quite pleased. Also got to hear them playing Money for Nothing at 112db/1 meter, wow, these things really crank with about 96db efficiency.
Also experimenting with finishes, I'm leaning towards spray Spar varnish, goes on really smooth and the stuff is tough as nails, here is a test piece with no grain filler, just clear gloss spar urethane over the 220grit finished wood. 3 coats no sanding
I'll break the cabinets down to raw wood this week and spend a few weeks on the clear coat process, stay tuned.