I actually like the "coupe" front end on the photos of the E90 M3. Overall, I think the coupe has a better looking front end, but I prefer the middle and rear sections of the sedan.
Based on these spy photos, the E90 M3 is the best of both worlds (for me, at least).
2008 BMW 535i Space Gray, Black Leather, Dark Bamboo Trim| Sport Automatic with Paddles | Sport Package
2008 BMW M5 (gone, but not forgotten) Space Gray, Silverstone Merino Leather, Madeira Walnut Wood Trim | 7speed SMG | All options
Mods: Corsa Exhaust | RPI Ram Air Intake | H&R Sport Springs | Rogue Engineering 12mm spacers