Midrange driver for high SPL 3 way - AE TD6M vs 18 Sound 6ND430

I'm thinking of a 3-way with 15" woofer (maybe B&C 15BG100), 1" tweeter (maybe Scanspeak D2905/9700) and a suitable midrange (maybe ~300Hz-~3.5KHz).

I would have liked to consider the Volt VM572 - the speaker that inspires me is the ATC SCM150 ASL Pro... but I don't want to spend that much.

I would really like to use the 18Sound 6ND430 because of its cost but I am also looking at the AE TD6M, because I've had great experiences with the TD15H (I've built two huge subs with them, and they're fantastic).

How do these two drivers compare? Are there any others I should consider?
 
I use the 6ND430 actively crossed to the AE TD15S with very good results. If you need more output at 300hz maybe consider the 18 sound 8nmb430. The 8s will give you more sensitivity and output at 200-500hz at the cost of dispersion at 2Khz.

Beware the low Vas of the 15BG100. I have found low Vas B&C drivers are not so great at lower power. They're designed for compact high output systems always run at high power. This is one of the advantages on the AE woofers, they sound great at all levels. YMMV