The Epson Home Cinema 8700UB supports an anamorphic lens. The 8700UB is the first of the Home Cinema series to offer support. The Epson provides a single mode, and for that reason, you would use the usual anamorphic lens, and motorized sled combination, which moves the lens out of the way for 16:9 and 4:3 material. A number of other projectors today now offer two modes. The second allows you to watch 16:9 and 4:3 with the lens in place. That's not as good as the sled solution from a pure performance standpoint, but it is a money saver. If you are interested in that solution - anamorphic lens, without a sled, then I suggest the Epson Pro Cinema 9700UB, which is pretty much identical, but for having a black case, and different names for several of the preset color modes.
The Pro Cinema 9700 costs about $1000 more and in addition to the second anamorphic mode, it has a third year warranty, and comes with a ceiling mount and a spare lamp. (Epson's been doing that package with the Pro series for four generations).