Guys I see SO MANY threads asking the same questions. As a LONG time user of RD's the best advice I can give anyone is two things.
1) PLEASE use the search feature
2) Buy each RD try them YOURSELF then keep the one that fits YOUR needs. Do not care what others say. I can tell you I lean towards the V1 (shocker I know) BUT so many others that I know do not like the V1 because it is "too chatty". It is like Coke vs Pepsi. One is not really better over the other it just come down to what YOU are looking for