I have owned a Canon t3i with the 18-55 lens for almost 2 years now, but have never upgraded due to financial reasons, however I am looking to buy more lenses and a Camera body. Honestly, I don't really care about the 18-55 because I will be selling that with my T3i to one of my friends' who is wanting to get into SLR's. I am looking at either the 7D or the 6D. Granted, I know that 7D is an APS-C with higher fps, and the body is built better with aluminum. The 6D is a full frame with much better low light high ISO performance, but is also almost $900-$1000 more expensive considering that a used 7D is around $700-$800.

Also, if I go the 6D route, obviously I will buy 3-4 lenses that are used with the 6D or 3-4 lenses with the 7D.

Here is what I shoot: Landscape, wildlife, light trails, sunrises and sunsets (not directly but when the sun is rising/setting behind buildings, the city, et cetera). I definitely plan on getting into Macro photography this year, and would love to do some Star Trails also.

The Cameras I have taken a look at are:
7D

70D (However I do stills, and not video and the ISO is better than the 7D, but not as good as the 6D, but I am wondering if that would be another camera to consider)

5D Mark II (Granted the 6D is better/newer and can be found for around just a few hundred dollars more when there are specials on it)

6D.

I have also took a look at the 5D Mark III, but sadly the price is far out of my reach.

As a final note, I am not concerned with Wifi or ***.

Let me know what you think about what camera body I should go with.

Thanks

Scott