I bought my 2010 C30 R Design (automatic) at the very end of the sales year. It's the "classic style" before they changed the look of the front end. I'm very satisfied with the performance and reliability. I have over 52,000 on mine without any problems to speak of.
This is a great, fun to drive car that's a head-turner. I would suggest that you stay away from the light colored leather seats that wear poorly.
More mile per gallon, without losing much H.P., is always a great idea. Dump the light tan/beige leather seat color as an option. It wears very poorly and can't be cleaned easily.