While there is an abundance of BMW 5 Series spy photos, the next generation 2011 BMW 6 Series test mules are laying low for now. The new 6er is scheduled to be revealed in the second half of next year with sales beginning in 2011.

To substitute the lack of spy shots, several renderings artists have been putting their skills to use in creating some new renders of what they believe the next 6 Series would look like. While the previous computer generated images were all based on the CS Concept design language, this latest image takes an unique approach, despite some Z4 design influences.

But what do we really know about the next 6 Series?

Well, for starters, it will come in three flavors: Coupe, Convertible and the almighty M6. Also, the 2011 BMW 6 Series is slightly longer and wider than the current generation. The overall 6 Series appearance will carry over, BMW has mentioned that the new 6 will be evolutionary and keeping the premium sport car image from the current model. As signaled by BMW’s new CS concept, the automaker will be abandoning its awkward trunk design features in favor of a more streamlined design. It will have shorter overhangs and a lower roofline which implicitly gives the car a more muscular look.

The headlights will resemble in some ways the ones from the CS Concept, which is good news for the die hard CS fans. We also expect a larger than usual front-grille, a trend seen in the latest models.

The 2011 6-Series will offer more legroom for rear passengers. At the same time, it will get a sportier cockpit with a more driver oriented console layout, a trend seen in the most recent BMW models or concepts.

To give us even more hope, according to BMW North American CEO, Jim O’Donnell, the next next 6-series coupe and convertible will be radically different from the current cars’ styling. He agrees that the current 6-Series is very polarizing due to the “Bangle butt” it carries, but the redesigned 6er, will be a “super sleek” vehicle.

Best-looking BMW in years, says U.S. chief.