Audio Research LS16 vs. LS25 , 25 disco?

Has anyone had the chance to do a real A/B of the ARC LS16 vs. the LS25? Also, is the LS25 about to be replaced?
The LS25 has already been replaced with the Mark II version. It uses 6H30 tubes (supposed to be good for 10,000 hours)and is a new PCB. The upgrade costs $995K. Call ARC and they can fax you the product announcement.
Mikebarney:....thanks for the post. Have you had the chance to hear the Mark II of the LS25?