I have sp4805 since 2005 still the same blub with 6000 hours,my trick is to reset the lamp hours at about 1900 hours and right down,and also i think infocus makes the best projectors hands down,I have no problems with this unit and it ranks with the best,and it can decode 1080I also, for 800.00 can't beat that.
Nice... that about what I want to build someday...Have not gone through the whole thread, but here my setup. Been complete about a year now. Still has not lost the wow effect!
Mitsubishi HC 6000 projected on a Da-Lite Highpower @ 119".