Yeah it seems there are some 1.6's out there, but there must not be too many because every post i've read have all had 1.4-1.5. I wanted an older version so i wouldn't have to deal with rebuilding the LPC. Here's the specs on my box:
Halo SE v1.6
2004-04-03 :Mfg Date
Philips DVD Model # VAD6035/21
Seagate HDD Model: ST310014ACE
Xcaliber video encoder
samsung ram
This is the second 1.6 i've done, both had the same DVD and HDD. The second one was manufactured in sept 2004 i think.