What a scammer! This sounds like something I'd do.
The debate between Canon and Nikon is almost as fierce as the debate between apple fans and android fans. Personally I think for entry level DSLRs (and entry level people operating the gear) either brand will provide you with good results if you spend some time reading about how to take pictures.
The best results will come from getting over the fear factor of shooting in full manual and setting up custom white balance since the auto white balance sensors get so confused by aquarium lighting.
For less than $1000 I get images comparable to folks with multi-thousand dollar setups. The entry level stuff is good. I can't see it ever being worth an additional $5k (or more) to make my images 3% better.
But then again if you would have told me years ago after setting up my first planted tank that I would be spending thousands on a reef tank I would have laughed. Funny thing about hobbies... And how they compel us to spend our money.
I just added more pics from the Canon T3 over here, if anyone is interested
http://www.aquariumadvice.com/forums/f14/forts-57-gallon-rimless-reef-build-195353-20.html#post2247891