Hey All

This is my first post beside my introduction post. So forgive me for being so slack.
I am currently enrolled in Tafe doing a Cert IV in Digital Imaging so I am adjusting being at school again lol

So my questions are: I am about to upgrade my camera body. I have a 20D but feel like my photos are lacking the "Show Factor" they need, against my class mates. Maybe it is just me.
I have the following lenses
EF-S 17-85mm 1:4-5.6 IS USM and EF 50mmf/1.8II. I also have a Zoom Lens EF 70-300mm 1:4.5-5.6 DO IS USM.

I have looked at the Canon, 60D, 6D, 7D, 5D Mark II and 5D Mark III AND Nikon D800

If I stay with the Canon I have the lenses. But as my interest is Pet/Equine Sport Photography I probably do not have the right lens.
I also like Portrait, Old Buildings, and Wildlife as I have abundance in my yard.

If I went Nikon I would have to restart.

Of course money is a issue. As I don't have it laying around to just buy the lot again.

A little advice will go a long way if you could steer me in the right direction. Any Thoughts...P.S I do love the full frame sensors :P
Cheers Shaz