christep has a good point, as long as all you want is some extra legroom. AA's MRTC has a pitch mid-way between WT and WT+ on BA (31" and 38" respectively, the same as Economy and Premium on Virgin) - I don't believe there's any more width though.
In my experience, service on either BA or VS is far superior to any of the US carriers, where a smile is a rare sight. I've often wondered why this is, when the US sets such high standards for service industries in general (I'm thinking restaurants and shops), to the point of being a bit overwhelming for us Brits.