I've been looking for a new saw for about a year, then having settled on the R4511 I've waited another six months (because they disappeared from the Home Depot web site and the local stores didn’t have them) so after Adam suggested calling more stores I got lucky; not only did the third store have one, it was on sale for $499. I just got back and scooted it onto my motorcycle lift for assembly (Sunday?).
That is not how I usually spend my Friday nights, but I’m a happy camper and the store was still only 20 miles from home.
It has never been listed as discontinued, and even the tacky sale sign doesn’t mention it. I will hope that the warranty is good, and that, better yet, I don’t have to use it.