Should you upgrade or not?
A novella by jostenmeat
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Let's talk about A) source quality, and B) light control and its supreme importance in terms of performance. I hope you will forgive what will probably be numerous comparisons to audio performance.
A) An ok pair of speakers with excellent source material will sound better than a pair costing double with lesser source material. Therefore, I urge you to spend $30 on an antenna, $10 on a coax cable, and hopefully you have an ATSC tuner somewhere, probably not, hmmm, oh wait maybe your DTV does. Then, any NFL game, Olympics, Final Four basketball, etc, flip from DTV to OTA. The free stuff is actually the best stuff, because it's not REcompressed once again by the provider (DTV in this case).
Use this resource for an idea:
http://www.tvfool.com/?option=com_wrapper&Itemid=29
Streaming is a joke, quality-wise, compared to the BD. You can read my thoughts
here.
B) An ok pair of speakers in an excellent room will sound much better than a pair costing double in a terrible room (after all over half of what we hear is the room). Likewise, an ok PJ in an excellent room will look much better than a unit costing double in a bad room. Light control is not just outdoor light, it's the indoor light. Leaving any light on, FOR ME, is absolutely unacceptable with any BD, and perhaps is ok for TV. You lose contrast at an exponential rate with the increase of ambient light. TRUE light control means not only is there no lights on, but all of your ceiling, floors, walls are not painted black, but actually covered in black telescope-grade velvet. My ceiling is black, my floor is black, my screen wall is black, and sidewalls are dark burgundy curtains.
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Screens.
So now you have the above perspective in mind, yet an upgrade can still be reasonable. But I have to ask you, do you want to spend on better performance with your terrible light control, or would you rather spend on ideal environment/performance? Totally different applications here, and you can't have both, unless willing to buy two different screens.
For bad light control, you'll likely have to blow the entire budget for something like a Screen Innovations Black Diamond. For much less money, you can amplify your brightness with a Dalite High Power screen, at the expense of limited PJ placement and viewing cone for widespread viewers.
I just upgraded to DIY Seymour AT material, and holy crap is it awesome for movies. I think for sports, it's really not that important, or TV, etc.
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Projectors.
The main benefit in upgrading for terrible light control conditions would be brightness. A much better reason to upgrade here would be for the ideal environment, where contrast all of a sudden will make a difference.
It would kill most of your budget, but you can now land a JVC HD250 for 2.5k. However, for your purposes, I think it's probably not the best idea. Yet, it will be brighter when calibrated, it will give you the highest fill ratio vs the lowest, and is just in a completely different category as far as reliability (for one, it uses sealed light paths; virtually no chance of dust blobs).
The main compromise is that you have less calibration tools, namely that it lacks a CMS.
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Tweaks.
You might find a big boost in brightness by using a microfiber and isopropyl on your prism/diffuser. I did, it was like putting in a brand new bulb, but for free. YMMV. Speculation is that it must be residue from bulbs degassing.
Or you can put your PJ closer to screen for increased brightness, at the expense of contrast. Getting a smaller screen size (or masking of the current screen) will of course also increase brightness.
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Questions?