95K for Denon x 4400 & 1.01L for Marantz 6012?.. 95K for Denon x 4400 seems a good price..
This on looks to be a 8inch driver.. I doubt if it will dig deeper in the freq response, also if sea wind would do anything to subwoofer freq..
You may consider other 12 inch sub offerings inside your budget of 75K..
Taga Harmony Platinum range of speakers.. I would try to complete the set-up with as many speakers as possible.. My suggestion would be Taga LCR-60, for it is 14K per speaker and shallow in depth (11cm) and has flexible wall mount options.. I would buy 7 of these speakers and wall mount it in the room to complete the bed layer..