If you have a search around this forum, when that review was out I (and others) slagged it off big time for being a complete pile of

!! In brief, the Lumagen was running 2 month old BETA firmware at the time, the Cinemateq reviewed was the basic PO not the Plus II or Plus II SDI as advertised, and I would not be surprised if the reviewer was in fact not able to set the machines up optimally given these quite flagrant mistakes.
I have compared a Lumagen DVI, Lumagen HDP and iScan HD directly with each other. I prefered the DVI just over the HD, with the Lumagen toolset (y/c delay, genlock, gamma adjustment etc) making it far more inviting than the DVDO product. The Lumagen HDP was significantly better than the HD. Cleaner, more detailed, smoother. Both units are also far more configurable than the DVDO.
I look forward to seeing the VP30 though. Apparently some improvements to the processing (although using the same SIL504 chip I can't see how you can get *that* much more from it than Lumagen already have, and Lumagen get to use their own enhancements and scaling, DVDO use ABT and the parterning SilImage co-processor) and the massive 4 HDMI input configuration. I imagine they will have taken from Lumagens lead and added improvement gamma, grayscale and colour adjustment, although I don't see any clues in the spec on their website.