Sounds like Meridian, have really pulled the stops out with the v6. However, given that they have almost changed every aspect of the 861 I wonder why they have retained the same 150 MIPS DSP chips.
I did a casual search of DSP chips suppliers and a lot of the suppliers I found have these DSP chips list as obsolete.

DSPA56367PV150
Freescale Semiconductor
Description: 367 WITH AX3/AC3/DTS
Lifecycle: Obsolete
I would have thought M would have taken this opportunity to migrate to an up to date chip with a longer lifecycle and one that has more MIPS available.
May be the v7 will have new DSPs.......

Regards,
Carl