Dixi you need to add more geo in middle and outside of the curvature area. http://www.onnovanbraam.com/index.php?tutorials/polygon_modeling_6_techniques_2/
OK I have tried it with more geo, much easier to work with! Would it be a good idea to add a turbosmooth but smooth results by smoothing group, this adding more geometry which creates 'natural' support edges. Then colapse this and add in tighter support edges?? Then add another turbosmooth? Or is that a bad workflow? And…