u are kidding right??? Epson TW4500 is either the 8500UB or 8700UB(the projector I bought)... It is far more superior to the Mits HC4000... I am guessing u are getting it at under 90k(as u are comparing it with the HC4000)... I would say run & buy it blindlly... & if u dont want to buy it pls PM me which shop is selling it as I have a few frnds who might be interested in it...
PS Epson 8500UB & 8700UB have both won the Best in class award in the $2000-3500 category... Mits HC4000,however good is still is a under $1500 projector... No competition...