Whoa. So far the contenders are:
Martin Logan Dynamo 300
Dayton Audio SUB-800
NXG-8 (intriguing, but not in stock that I can find)
Consideration would be given to the Outlaw sub, but it's skirting the $300 price limit and with shipping....busts that limit. If I go up to $300, I need the sub to be head and shoulder above the rest and on the surface, it doesn't seem to be any better than the ML 300 or Dayton models.
The NXG is intriguing because of it's aluminum looking cone material. The Infinity Entra satellites I will be utilizing boast a CMMD sandwich of Ceramic, Alumina & Aluminum. I usually like to match driver materials because I'm a believer in timbre matching. The speed of sound is influenced by driver material. With proper DSP from a receiver, any delays in sound arrival likely will get tightened up anyway, but it's always worked for me to match driver materials from sub to tweet like I did in my living room running all poly drivers.
Regardless, I'd like more opinions from the masses on this one. Fire away bassheads!