Haven´t owned butheard the Diamonds compared to Lumen White I would strongly recommend the Lumens. To me and to the other people attending this shoot out the Lumens were by quite a big margin the winners - and they have got plenty of slam... Probably David this is the speaker for you? Otherwise if costs is not an object - ACapella Sphäron Excalibur...
Equippment used was (as far as I remember): Vyger Atlantis turntable; Lumen White White Light speakers; cabeling was completely from Shunyata; digital was provided by DCS and amplification was complete Ayon Audio).