Hi Rosemary -
My advice, not that it's worth too much:

There are quite a few bugs, so it kind of depends on how short your temper is. LOL If you don't get all tingly and excited when you think about playing VV2, I recommend waiting. Especially if you have a slower connection - then you won't have to download things twice.

Also, the longer you wait, the more likely it is that one of the game sites will have it on sale.
(I don't know anything about how VV2 is being distributed, but I did get VV1 for half price.)