kanoysta:
But the new projector won't solve upscalling for sources that aren't 1080p. My main video source will be a Xbox360 reading divx and mkv. Blu Ray will come later . with the projector, when I can get the most of it 🙂. Do you think I will get any advantage on the Optoma HD3000 connected to the xbox or the AV receiver that i will buy will be enough?
It should be clarified - just in case - that almost all projectors have upscaling built-in, save for an exotic few that locate said scaling in an external box. So a device with a native 1280 x 720 resolution, like your InFocus, will scale lower-resolution signals to 720p: another projector with 1920 x 1080 resolution will do the same job, but to 1080p. That's without the help of an AV receiver, an external video processor box or an upscaling DVD player (or similar).
So if you're worred that you're not seeing 720p already - well, you are. After a fashion. And by the way, there's nothing to be gained from scaling lower-resolution signals up to 1080p for use with your existing projector - they'll have to be scaled again by the projector before being displayed (at 720p).
Simple functionality is only part of the story: quality also has a role to play. As the good Professor points out, a superior projector (such as the Panasonic model I mentioned) should have a superior scaler built in to it. And as has also been pointed out, it's hard to make a silk purse out of a sow's ear, no matter how much cash you throw at the issue: lower-quality source material will always look fairly poor, even when fed through an exceptionally capable external video processor.
But this is the most important point of all: scaling is not the only defining element of a good picture. In projectors, much depends on optics, light engine and the native resolution (plus associated technology) of the projector itself. Put a £1000 Sanyo with 1080p upscaling next to a £25,000 SIM2 with a similar scaling specification (not necessarily performance, but simple number-crunching functionality) and you'll see what I mean. So in answer to your question: regardless of the price you're able to get it for, I wouldn't spend my money buying an Optoma HD3000 for use with your projector. Instead, I'd put every penny of its projected cost towards buying a new, better projector.