I have V7's (7, 10, 13 & 17m).
I have been told that the V8 is a very similar canopy to the V7, but the bridle is improved for easier turning.
Would be interested to hear of the differences, if anyone has used both.
You can't really go wrong with the V7's, they are great kites - nice wide ranges of use, so much so that I have never had the bottle to use the 7m powered up - in 40 knots+ it would be a beast, less than 40 knots, for me its a bit meh. The peaches in the range - for me - are 10/13/17.