I am emerging from the shadows to make my first post in several years and report on my experience with the RS40.
I bought it when they first came out, purchased through AVScience (love you guys!) to replace my RS1 (also an AVScience purchase)
In Feb 2012 the lamp went south at 800 hours and was replaced at no charge by JVC. The new lamp had a different design that seemed meant to dissipate heat better.
A few weeks ago I had a bit of a scare with the lamp warning lights coming on and the projector not powering up so purchased an OEM JVC replacement bulb through AVScience. Pulling the plug, cleaning the filters and giving it a rest brought it back that time. That lamp had run for 1800 hours and I bumped it up to high power mode at about the 1200 hour mark when it started to seem a bit dim.
Now I've got that fresh lamp retina-burning brightness joy back. I measured it with a light meter and saw the measured lumens output quadruple after swapping the lamp. The old lamp doesn't show any "blow-out" like prior lamps have before they go, so it will make a fine emergency backup.
I remain very happy with the projector. It does sometimes get stuck on power-on with the display of the DILA logo/banner, requiring me to yank the power cord to reset it. Other than that it is performing like a trooper.