I certainly haven't heard any real, meaningful data when it comes to reliability of Sony vs. JVC. About the only thing that is truly discussed is LCoS degradation, which is very questionably a thing. Some say that have seen it, or even measured it, others have conflicting reports. Since so few seem to complain, I'm guessing that failure sits with typical of electronics (under 2% from what I recall). So, if it is good out of the box, you likely are set for years to come.
Laser is a good choice, but right now it adds a healthy premium to the price. It adds the most notable advantage of consistent light output over the long haul. So, if it is bright on day one, it will be bright for years to come. But, when it fails, it is catastrophic. That is, the cost to replace the light engine will be well more than the value of the projector. They don't make laser light engines to be replaced. So, a real shame if it fails ahead of 20,000 hours. But, out of warranty means out of luck.
Lamps are really no different though. They have short warranties and if the ballast fails, or some other component critical to the operation of the lamp and cooling system, then you are out of luck.
My preference is probably for laser, but it will be a number of years I expect before we see them on mid-line Sony and JVC models. While JVC isn't even in this game from what I can tell, Sony is, but they are doing it at ... what? $25,000? I think we are off by a solid $20,000 from where things really should be.
And will be.
The name of the game with technology is just sitting around long enough and you will be able to afford it.
But, for the ten years between now and then, it may be necessary to just buy what is good enough and within your budget. I would take either a Sony or a JVC in a second without much in the way of concern over reliability.
