We love the V Room
I haven't tried the other lounges as we normally end up getting this free as part of a special offer for early booking etc
Personally I like to just sit somewhere that is calm and peaceful with a cup of coffee and a newspaper before boarding the plane
I have always found the staff in there to be excellent as well
We are trying the VA Clubhouse for our trip in October as we have booked flights directly with VA so couldn't use the V Room. Be interesting to see what that's like