As my 800 V3 is on it's way back to M with what seems to be a bad ROM Drive, I was wondering if a V4 upgrade was worth having done?

I have the video angle coverd already as the unit has an SDI module which feeds an external VP.

Any opinions on audio improvements with V4?

TIA.

Martin.

861V4, HD621, DSP5000, DSP5500HC, Sony VPL-VW90ES