I think I'm going to get 24mm first, then if/when I feel the need, add 35mm.

One last Q... looking at some of the reviews on Internet, some of them talks about focus shift when stopping down. Some of them also talks about barrel distortion. But... thinking these lens have existed since long before Internet was so popular, and everyone reviewing everything, and I haven't heard anyone actually complain outside of these reviews, these aren't really issues one needs to worry about, is it? (and please keep in mind, I will be using these lens on film and digital bodies)