The 2150 does not measure up to pretty much any of the DLP models in terms of overall image quality. It is lower in contrast.

The 3200 or 3800 models from Epson are a much better choice.

From their online site, the refurbished 3100 or 3700 would be a better way to go as well.

They give a bump up in both brightness and contrast over the 2150 and will be on par with the lower brightness DLP entry level models.

You haven't really talked about placement flexibility, which is often a very important factor when doing a installation of this type. You can't just put a projector 'wherever', so getting the much better lens setup of the 3000 series Epson projectors is almost a must.

Of note, if you don't have good light control, you will lose the black floor and contrast will drop significantly.

Not in terms of overall placement flexibility with the brightness it offers.

Please be aware, that contrast goes out the window in any room that has almost any ambient light in it. Contrast is typically increased with deep blacks. A 6,000 lumen projector has only twice the contrast of a 3,000 lumen projector if the black levels are the same. But, cut .5 lumens off the black levels and you could quintuple the rated contrast. So, it is the black levels that create high contrast ratios... and when you have any ambient light in a room, you kill those black levels.

So, that's just something to keep in mind. But, I do consider the 3700 one of the better bright/quality/flexibility models out there.