Well, my B stock RS4810 arrived today and so far I am extremely pleased.
The until was like brand new in the way it was packaged and handled. There were zero hours on the lamp.
There was also a QC checklist of a variety of performance checks they performed before sending it out. I did the focus and convergence and everything seemed good. I am having Chad Billheimer out next month to calibrate it.
I spent several hours viewing against the white walls in the dedicated room it will be in. The room is about 12x10 (not counting closet space where the projector will be ceiling mounted). This is my first projector and I am just stunned at how cool this is going to be. I am sitting about 10 feet back at 125" 16:9 and it's just amazing. I am experimenting a bit with the size, but really like that so far. Incredibly theatrical. I am getting the room painted black (shooting for the Rosco velour black) and carpeted black within the next 7-10 days. I can only imagine once I select a screen size, in the finished room, and calibrated how incredible this is going to be.
I also just want to say it has been an absolute pleasure working with Mike Garrett of AV Science Sales. He's been outstanding and very courteous to work with answering many of my questions on the phone and e-mail - with very fast replies. Highly recommended.