Thought I'd follow up my query with my decision... I ended up with the samsung 51d550 and I am not sorry
Test driven in home with a 720p media file of last weekend's F1 with a beanbag at point blank range and cant wipe the smile off my face
This thing is a full double the width and height of the old screen!! I have to look side to side to take it all in
(it's a bit more reasonable from the couch)
In-home reflections are not as much as the brightly lit store, and better than my old CRT. They dont bug me at all, but are present if i look for them in the dark on screen areas. Even in the day the screen is quite watchable and i only notice reflections in dark areas... The windows at the side of the TV are less of a problem as the flat screen is well, flat... so i dont see them anymore which i did with the curved cheapy CRT... I can even let the S.O. open the curtains a bit for something she calls "fresh air", and if I sit in the sweet spot all is good.
As advised i've got the brightness and contrast down ~50-60, for some burn in time, but with it cranked up, reflections are not an issue in my opinion in my setting etc etc
Any motion issues are not the issue with the screen as far as i can tell and depend more on the source... (but perhaps the "better" screens fix bad sources better?) who knows, but I'm certainly very happy. Might have been nice to have a d8000, but at double the price i'm not sure it would pay off...
It's also quite a capable media player, hitting everything i've thrown at it so far, including 720p mkv that my other player chokes on, and playing a 3d-half-sbs mkv. Port 1 plays a usb-powered WD 750gb drive ok, but not port 2 (it seems flash only), but they are labelled as such, so no biggy.
Remote maps pretty well to the dp-lite remote br01 (code 216 i think) with most everyday buttons there, somewhere... (popup=menu, arrows work, play/stop etc work, numbers, volume, channel etc )
Minor bugs: slow UI through the menus and some non-intuitive places for things scattered about. Would much prefer to have one big menu than a half dozen sub-menus, and the tree structure present lends itself to it... but once it's set up i guess i wont be going back and forth so much.
When in the media player if you're in a menu and you back out you can back out one too many times and be kicked out of the playback- and with the control lag this is a tad frustrating... leading into the player has no bookmark/resume memory so good luck finding where you were again. Skipping is by 10sec per click or some FF. You can search by time, but need a special key on the samsung remote ("tools" which isnt mapped on the beyonwiz remote) and then you press number buttons to go 1 0 0 0 0 to get to 1hr:00min:00sec and then enter, and then back once, not twice or your back to the file menu.
Last annoyance is that the channel change button will dump you from an input to the TV, so if you're on the HDMI input using the beyonwiz (say) and you change channel on the BW-remote, but accidentally have the remote on TV rather than STB you change the TV off the input and onto the MUCH louder TV-TV rather than the BW-TV... and then its a scramble to turn the volume down or change the inputs back. It really should just have the channel change buttons disabled when on other inputs....
Ok, one more annoyance- there is no per-input volume memory. Something i wish they would do more often, especially considering the the pvr/media players i have off HDMI are much quieter than the inbuilt TV tuner. There are dozens of setting in the UI already, having 8, 2 digit memories of last used volume (or offset) cant be that technologically difficult can it? Even setting the inputs to max themselves and exclusively using the TV vol is nowhere near close enough. Might be a job for some future amplifier package???
No deal breakers for me, just a silly bit of UI which could easily be addressed, but i wont hold my breath