Why not the Mach5 MJ-18 instead? It seems to be a little more robust for about the same price.You know what, forget the 15" DVC. If we really want to try a cheapo driver out, the Dayton Classic 18" might be even better.
The Ascendant Audio Havoc 18 might be worth testing too. I'm willing to donate $25 each for any of the following: Havoc18, RLp18, Fi Q18, Aura NS18.