CDS1 to 2

Got the CDS2 head upgrade back on Saturday, what a superb bit of kit. Can anyone who has done this describe the warm up / burn in improvements. I had the CDSPS warmed for 3 weeks and the sound opened up noticably for the first hour and has since sounded awesome on the Fraim.

Also what are the merits and improvements gained by adding Black Burndy and XPS in lieu of CDSPS?