After much thought, I brought back my unopened tv (WAN45) to Costco on Friday, and exchanged it for a new one (WAP04). It was part of a batch of them that the store sent back to Vizio, and were very willing to exchange it. I spent yesterday running wires and cables through the wall in our family room, got it mounted on the wall, and we're watching it now.
I could not be more pleased with this tv. The picture is awesome, after some tweaking. I have no lip-synch issues at all. I had a bit of a delay at first using my receiver, but that was while I was running the optical cable directly from my cable box while getting the video via HMDI from the tv to the cable box (I currently have an old Yamaha receiver that doesn't have any HDMI inputs). I switched over to running an optical cable directly from the digital out on the Vizio to my receiver, and now it's perfect. No lip-synch issues at all. I haven't fiddled with the wifi yet, but I got this thing for it's picture, and it has not disappointed. I love it!
I certainly understand why others that have had issues with their tv have exchanged them for another e601-a3 instead of switching to another brand. The picture is stunning, and for a great price for a 60 inch smart tv. I'm hoping that I won't have any issues, but if I do, I will definitely stay with this model. I'm very pleased.