No, I haven't had any experience with the Fostex drivers so I can't say how they compare with Bandors.

I'm very keen on the open baffle approach but would need to high-pass filter if I tried it with the Bandors, in order to keep the cone excursion down (they're only 2" diameter). Might be interesting from about 150Hz up though with a matching dipole bass.

Have you visited Linkwitz's web site? He's a top designer and the site's well worth a visit.

PS: I've read your post at the top of the page and I'd say we're in broad agreement on the room thing.