Though, if our two current choices are 'vaguely posh brit' and 'vaguely city brit' ... I'm not sure how optimistic I'm feeling that getting two more feminine-tones ones will actually have a good chance of offering one I might like to use for... er... any of my characters.
In particular, they should supply at least a positive-geared accent neutral choice, and a dark/selfish geared accent neutral choice in both masculine and feminine types. Fingers crossed I guess.