The 6D is a tough camera to chose- on theo ne hand you have the crop sensor that offers more features for a bit less money- but is a crop sensor- on the other hand you have the 5D's which offer more but for more money (not sure hwat hte 5D2 is sellign for htese days, might be near the price of the 6D) The geotagging of hte 6D is nice- as is the wireless stuff- and from what I'm seeing, it appears to shoot good photos on par with 5D? but personally I think I'd go the 5D route (and pick up a 7D as secodnary camera both for reach with hte logner lenses, and for speed fps-- but in the end I went with hte 1DX as my primary and 7D as secondary- the way I figured it was that while the 1DX is 2x's the money it's also rated for 400,000 shutter actuations, is built like a sherman tank, is reaqlly weather sealed, has excellent low light (as does the 5D3) and is blazing fast and has a built in voice recorder, and since I love lsitenign to my own voice, I lsiten to recordings over aqnd over again because I can (just kidding)- I woudl however have liked it if it included geotagging-
I had briefly htought abotu savign my inheritance money and buying the 6D- but as rough o ncameras as I am, I figured I would need the toughness of the 1DX, and when the shutter does eventually go out, I can have it repalced reasonably and be hopefully set for aniother coupel of hundred thousand shots as the camera might be rugged enough that it's still in fairly good shape by then whereas the 5D3 might not be (I tend to trip a lot when otu in the woods walkign htrough tangled brush etc- and slippiong on rocks crossing streams etc- Of course though, I suppsoe you coudl get insurance for around $150 or so a year that woudl cover a replacement of the 5D3 shoudl somethign happen to it-