Which cineform product will work with Vegas to take P2 HD footage from an HVX? Thank in advance.

All of them, but NEO HD is the best price performance option for Vegas.

This isn't going to Blu-ray or anything, just to DVD, so Neo should be ok?

NEO HD is not impacting quality in any way (same 10-bit codec as the high-end products.) If you want some savings consider NEO HDV instead.

Yes, I am looking at the best and easiest workflow with these HD files - if Neo can do it, then so be it!