Anyone using these must remember the source for 1080P out must be 1080P in. If you are inputting 1080i, it will look bad, such as a broadcast signal.
I do have to say the Kanex Pro looks sexy with all those connections. The addition of things like Automatic Up-Scaler Built-in for Scaling and supported resolutions, Image Enchancement, Noise Reduction Mechanism and support for 480i/576i/1080i as inputs. It even has line interleaved 3D output for passive glasses with polarized display.
So the question becomes, will the scaling and noise reduction reflect in the PQ? Well most likely yes, but maybe not for 1080P sources. The 3D-Bee's claim to fame seems to be their saying that they do no post processing other than conversion.
So it'd be more interesting to see this unit compared to the Bee, and see if things like Image Sharpening - Spatial adaptive ( Gradient Based), Adaptive Edge Enhancement,Bad Light Correction - Region adaptive, De-blocking- reducing compression artifacts, Filtering random noise give it a clear disadvantage when a 1080P signal is received and output. My money would be on this unit for DVD's and sub quality Blu-rays.
But for the budget minded or non-discretionary, the Monoprice seems like a safe bet as long as the input source is 480p, 720p, 1080p.