Let's look first, at the direct DLP competition, Optoma also offers one year, as does Acer. Viewsonic though offers a three year parts and labor warranty. Panasonic is at two years, but does have a limit on hours, that would shorten the warranty for heavy users. Epsons multiple projectors in that range of prices offers up 2 years parts and labor, and the only rapid replacement program of any brand (for both years). One of theirs has 3 years, and 3 of replacement.
I don't like one year warranties, for fear that a warranty type problem in your second year of ownership, will probably be expensive without warranty. By comparison, a failure in the 3rd year of operation has a silver lining - you just might be able to by a much better replacement, for far less.
3rd party warranty programs are pretty inexpensive. I don't have as high a confidence in them, in general as I do for manufacturer warranties, as I was aware of occasional issues, when I owned a large online projector sales company.