before these processing methods were out (e-shift, darbee, RC) I would have agreed. There were some poor attempts at trying to improve the image.
These current processing methods have impressed some of the toughest purists because when used in moderation, they all do a nice job of improving the PQ. The larger the screen and the closer the seating distance, the more obvious these changes become. I haven't seen much negative attention on the darbee, it's quite the opposite - the vast majority of folks who have one like it.
I use the darbee with my W7000 and the RS55. Both very different projectors, but it helps with both equally.
Sony also have a great implementation of the DI, better than the Epson, or BQ. I haven't had a chance yet to watch 2D on the HC8000, but there are a number of iris's on this model as well.