Main differences to me are that the HAF has a cage for 2.5" drives for SSDs, and is slightly larger than the other 2. Also it weighs in at almost 20 lbs. The Illusion is a lot lighter and flimsier. The Antec is inbetween, and has worse cable management.
As far as upgrades go, a sturdy case will last longer of course. I wouldn't want to recycle the case for a new build unless it was the HAF. That's just me though. Im sure if you took care you could keep the other two perfect for reuse also.
The illusion is all black inside and that looks pretty cool to me. But it would suck to have a flimsy side panel that is hard to attach to the case every time you open it up for something.