This depends on several factors. One, is the content 1080p/24Hz or not. Two, is the source player accurate. Three, do you like adding additional enhancements to the signal.
Anytime the video is not native 1080p/24Hz, the player will have to de-interlace and/or scale. You will also need to perform frame rate conversion either in the player or the display.
The player may not be an accurate transport. I recently used the Toshiba "Technicolor Certified" Blu-ray player and it suffers from massive color bleeding and fringing. There are also no controls on the player to adjust things like Sharpness, Contrast, Brightness, and so forth, so what you see is what you get. And what you get is not correct.
If you need additional enhancements such as Detail, Edge Enhancement or Noise Reduction, then these solutions are pretty good, but not as good as HQV or QDEO. But the Darbee makes up for this with its rather well implemented contrast, sharpness, and saturation enhancements.