Somewhat dated thread but as a former VX1k, VX2.1k and DVX100 owner I feel inclined to comment
The warm tones, sound, and classic vig of the VX1k / MK1 combo has made an unmistakeable place in skateboarding history.
The biggest upside to the VX2/21 would be the low-light capability IMO.
Personally, it would be hard not to go with a VX1 for pure nostalgia but realistically, if planning on filming in low-light and night I'd probably opt for the VX2/21.
Anyone ever own the little brother TRV-900?