My BenQ PE 8720 just took a dump so it's time for a new projector. I've enjoyed the performance of BenQ. This was my second BenQ projector. I'm considering the BenQ W7000, the Epson 5030UB, or the Panasonic AE8000. I'm leaning toward the BenQ as I can get the best price on the W7000 and it sounds like a great projector. My only concern is my last two BenQ projectors died by way of self destructing/ shattering color wheels after about 4 -5 years of use. Is this something I need to be concerned with if i decide to go forward with the W7000?