Again, understood. Can't help you on the price issue, obviously. But I'm saying, as a pretty picky HDTV-phile, that in my experience following that chart with a set such as the Sony you are considering will lead you to perfectly acceptable tradeoffs between resolution and "flaws"--certainly with a 1080p signal and very likely with 720p or 1080i signals.
I chose a 55HX800 (which is priced lower than the Sharp and by now FAR lower than the HX909), and I have the same viewing distance you will have. I then got it ISF calibrated. Very nice set-up.
A related point, which I'm sure you've also heard, is that in the Era of HD it is really quite rare to get a TV in your home and wish you had gone smaller. The damn things shrink over time.
Wonder if sonystyle canada do financing...