The server delivers to 2x HTPC, 2x Apple TV's, 2x droid tablets & Phones. Tested the server with 6 concurrent different transcoding streams without a hitch. downloads are handled via a seedbox/VPN, whilst I can't automate the downloads the peace of mind makes up for it.
The only thing I had to purchase when building was the CPU everything else was in my parts bin/ i was originally going for a low power i3 but the price on the xeon was just to hard to pass up.
My old Samsung series 4 plasma is on it's last legs so I have been shopping around of late. I also have a Panasonic 100 Hz 42 inch in the house, which has been a brilliant TV.
4K is atm a waste of time, as Rybags said there are no standards set, nor is there the content. Also as the TV upscale, anything less than 1080 looks bad. Realistically in Australia unless you are a 4k content creator, there isn't a good reason to go 4K and with our abysmal broadband we can't have 4k streaming (if it even existed here). For Australia 1080p is the way to go.
The problem with the curved tv's is that if you are not in the optimal seating poistion then the image at the side you are closest to gets trunkated. I had a good look at these while in Singapore and it is a noticible issue. These TV's would need to be 100 inch + to work correctly. Then there is the 4k issue.
Other brands to look at Panasonic (IPS panels), Sony & LG (IPS panels). I would also recommend have a look at the TV's in a shop other than JB as you will get more help there, eg taking in a blu ray so you have a visual standard to compare with.