The best camera for architectural renderings

I bought my first digital camera to shoot real estate in 2009, a super zoom, Sony HX1, a dinosaur that still roams the earth.   I substituted the sweep panorama capabilities for an ultra wide lens.  The distortion was not pleasing on most shots of buildings with height as a strong relative element.  On pictures of land or massive ball rooms without super high ceilings or long shopping centers, the panorama is actually superior to the ultra wide.  But I was not going to get what I wanted on houses, office buildings, or 90% of interiors without a true ultra wide lens.

So in 2011, I bought a Canon 60D (which has a fully articulating screen) with a 10-22 lens.  I use a tripod, so ISO capability is of no consequence.  I use Photomatix HDR software and take enough backers that I get everything in the scene exposed well, so dynamic range is also of no consequence.  I still need absolutely nothing else to do what I want to do with my main focus of photography, which is architecture and landscapes.  Sure I could do better with the kids sports and events and whatever else, but the only way I could get significantly better for architecture would be to go full frame.

If I were feeling really prosperous, I would get the 6D with the 17mmTSE and the 11-24.  Maybe the best perspective correction software would make the 11-24 the only one needed.  Or you could alway go for the ultimate and get the 5Dsr, but you don't print big, so you don't need the resolution.

Any old DSLR with a tripod and an ultra wide will work fine.  I think one of the cheapest which would also be one of the smallest and lightest would be the SL1 or 100D with the cheap, small, stabilized 10-18.  If you need the articulating, any of the other Rebels will have that and a few more features with not much more weight and cost.  Nikon has the same thing going with its 3K and 5K series, but I don't know if they make the same quality cheap ultra wide.   I have used 3'rd party lenses and have one now.  The lenses that are made by the company have always worked better for me.

Have fun.  Hold on to your wallet.