Aside from the issues covered regarding the TW5800's frame interpolation system, there are only one or two other, relatively minor problems I need to raise with the TW5800. First, while very quiet overall, the projector's optical system can chunter a little at times, a bit like a booting PC. Second, the darkest parts of its pictures don't retain quite as much shadow detail as they do on the best DLP rivals - such as the slightly cheaper InFocus IN82 and, especially, the superb £4,000 IN83.
These DLP projectors both deliver slightly richer colour palettes than the Epson too. But both these rival projectors suffer to some extent with the rainbow effect, run more noisily than the Epson, and fail to provide frame interpolation systems on a par with the admittedly flawed effort found on the TW5800.
JVC's £3,300 DLA-HD350 delivers more shadow detail in dark areas than the Epson, too, without any concerns about the rainbow effect - but for me the Epson's colour palette is slightly more natural - and easy to calibrate.
Although it's obviously disappointing that one of the TW5800's key features, Frame Interpolation, is rather problematic, it's worth pointing out that similar systems on most if not all other projectors and TVs are flawed too. In fact, the TW5800's stab at tackling the thorny issue of judder actually fares better than many, in most respects.
Furthermore, even if you decide not to use the Frame Interpolation system, the TW5800 still does enough, in my opinion, to make it a truly outstanding LCD projector. One that's worth its money and which thoroughly deserves to at least be auditioned against the JVC and InFocus models mentioned towards the end of the review.