I was asked in my place of work if I have any projector recommendations under 5000€. I am not super familiar with projectors but did some research and came across Epson Pro Cinema LS12000 and while the specs look good, I'm having trouble finding any good information about how well it can be calibrated to SDR rec.709? What really gives me pause are possible gamut issues, caused by it possibly having in-built calibration that can't be disabled, as mentioned in the guide. Gamut or color space is not mentioned in the manual once and best info I can find from google is 87% DCI-P3 coverage.

Does anyone have any experience with this projector? Are there any reasons to avoid it? The place I work only has an i1D3 but there is a correlation file in Ted's list for LS12000 and I will be using some version of CS. Which such limited tools the results aren't going to be perfect, I know, but they don't really have to be. I'm looking for "okay" results at worst, but if it can be calibrated really well, I would love know that too.

You can achieve a perfect REC.709 calibration by using an external LUT box.

First, pre-cal 100% White using the projector controls to define the peak output.

Then, find which colorspace setting provides the 'native gamut' (largest) coverage.

Select the gamma setting that is best to use, check contrast and brightness, and then profile with the 17-Point Cube.

https://www.avsforum.com/threads/colourspace-zro-low-cost-manual-calibration-software-thread.3175441/post-61584855

Jonahan
If you do decide to use an external LUT holder to calibrate the Epson for Rec.709, a great option is the BlackMagic Design 12G Bidirectional Micro Converter.

It does a great 33 point LUT at 4K resolution.

The only caveat is it won't pass HDMI protected material. So you may need to work around that depending on what content you work with.

Also, exporting .CUBE format LUTs I believe requires the LTE version or better. But best to confirm that.