So yeah, caved in and bought a 2nd hand 5D. I gotta say, it's not a huge, amazing improvement from my 400D thus far. Files are bigger, my 24-105 now actually has got wide angle, natural vignetting is sexy especially paired with filters, and sensor is dusty.

Obviously there are more advantages, like better noise capacities, possibilities of shorter shutter times, sturdier body and so on, but I'm not blown away by it. This far.

The biggest problem about it is that I don't have time to use it enough to really justify the cost. Oh well. I can always sell it off again.