If you can find one get a Vendetta SCP2a. I have the first Whest 0.20 and it was much better than a Tom Evans Groove. The Vendetta i got had to be re-capped and on the advice of John Curl I upgraded the IC chips. I don't worry about the next thing out there. It would be nice to have a phono stage with different EQ curves though.
I digress a little - I still can't fault the Whest and I'm sure the 4.0 would be better than what i have. lovely build, and James Henriot is a very knowledgable and helpful guy. I'm not qualified to comment on the others I hasten to add.
In terms of sound I did a review many moons ago and stand by it still. very good extension, body, and air. Superb at imaging and to my ears - not cold.