I would def go for the red HL and nude CLs, perfect, classy. The Missoni dress looks like cushion fabric IMO, and I agree with a previous poster that this sort of shape would only look good on Kate Moss or a hanger (actually, she is a hanger)
I think a HL can be classy too and not too sexy, it depend on how you wear it and what kind it is. Of course it is tight and that automaticly makes it sexy, but it can be n a classy way too?? Haha, yes I'm def not a Kate Moss so I either need to do something with the dress or exchange it!