With the right lighting this head sculpt looks amazing. It's a great looking sculpt already, albeit one that doesn't necessarily capture Harrison Ford very well for the most part, but shadows make a world of difference. There have been some very nice repaints as well that make it look much better under full light.
The chances of Hot Toys doing another one are probably very slim. The chances of Sideshow doing another one are probably much less slim, but not something I'd expect any time soon - they've already done their own, licensed out to Hot Toys for DX05 and licensed out to Medicom for theirs. That's a lot of Indies over the past few years. If we did see another Sideshow release, it would most likely have to be different in some capacity.
Personally, I wouldn't trade DX05 for any of the others.