I haven't seen any extra noise in the images. The PQ is very good. The quality is pretty much on par with the Benq HT1075. The only difference, so far, is accurate colour.
It was easier to get accurate colour out of the BenQ vs. the Optoma. Having said that, I used the settings posted on the forums for both units and I'm sure there's some level of variation from unit to unit. The Optoma likes to push a lot of RED and sometimes I notice a bit extra green with the BenQ. So far, accurate skin tone seems to be better on the BenQ.
I watch a lot of NHL Hockey during the season and I believe that the fast action and white ice surface is a good test for projectors (or any TV) so I compared the units using games on my PVR. They are pretty much even and the PQ is again, very good. Please note that I am not overly Tech. savvy but I am very picky when it comes to image quality. Over the past few months, I have viewed the Optoma HD25-LV, Optoma HD131x, Optoma HD25e, BenQ W1070, Epson 2030 and now the HD161X and HT1075.
Optoma HD131X: nice bright, crisp picture but motion was not smooth enough. In fact, the motion (+slight flickering) bothered my eyes.
Optoma HD25-LV: very crisp/very bright image that absolutely popped. Unfortunately, it again bothered my eyes to the point that it gave me a headache after viewing for only 10 min. This really disappointed me b/c I loved the bright image. My guess is that the choice of colour wheels in these units was the cause of my problems.
Optoma HD25e: decent image but not overly bright. It didn't have the "pop" that the other projectors had.
BenQ W1070: very nice image - the colours "popped". I was happy with it but the throw distance didn't work with my setup at that time.
Epson 2030: decent image but the motion wasn't smooth enough - again throw dist. didn't work.