I have my BDP-103 running in split A/V mode, with the Marvell processor output on HDMI 1 going to my Epson 5020 projector, and HDMI 2 going through my aging Onkyo 805 receiver to a mid range Panny plasma. The Oppo does a fine job of processing both video streams without the need for matrix switching or other workarounds. It turned out to be a perfect solution to running two displays with different requirements of picture quality.
The cleanup capabilities of the Marvell are very, very good. It makes DVD's look presentable on the projection screen. You'll never confuse a DVD with a Blu-ray, but it zaps a number of compression artifacts and helps fix color banding issues by outputting in deep color and/or dithering. It will also output DVD's at 1080p/24, which is a neat trick.
I'm going back and watching my entire catalog on the projector now, not just Blu-rays but DVD's as well, because of this device. It'll take a while but I've never seen anything like this before.