More like $2900.00 or $3100.00 according to recent sightings on the 5D3.
Anyhoo, that is still 4x the price of the T4i.
Your shots look very nice. You could certainly live without the more expensive camera.
I have the T3i, and I do wish I had better AF with more points, like the T4i or 7D or the 5D3.
The one thing I would be tempted by on the 5D3 is the low noise at high ISO. Frankly, I am sort of pissed that I cannot shoot at 800 ISO without what I consider unacceptable noise when shooting people. On the T3i, 800 would be fine for a dim-light cityscape or something intricate like that that hides the noise a little.
I look at what the pros say about shooting indoor basketball and such, and they say they routinely shoot at 6400 ISO to allow for fast enough shutter speed for moving targets, which is just a crazy dream on my camera. That is where you would see the value. If you are shooting posed stills, and if you have lighting, then maybe that is not worth the extra bucks.