I would normally go naked, but have already notice a few light marks along the tapered edges so though I'd try a cheap low profile case - picked this one up from Amazon and pretty impressed for £5. Main benefit is that it still slots into my 3G car holder albeit a snug fit 
http://www.amazon.co.uk/gp/product/B008OSEQ64/ref=oh_details_o03_s00_i00
http://www.amazon.co.uk/gp/product/B008OSEQ64/ref=oh_details_o03_s00_i00
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