Dont really have one here, or not lately.
As per an older post I recently purchased the XBR55X850B 4K 3D LED TV
4K imo is definitely worth it and the limited available sources of video are good enough for me as it let alone adding consistent stuff. In terms of netflix 4K streaming you need to pay the $12.99 a month to get the ultra HD which right now includes house of cards, Marco Polo, Breaking bad, and 4-5 scenery demo's like planet earth etc.
for free, and really good program you can use the "4k Video Downloader" and rip 4k youtube videos onto USB.
This TV has a very impressive processor for rendering 4k video and it's upconversion is excellent for 1080p and lower signals. However, with very old or just bad quality recordings, some shows look terrible.
This TV is -by far- the best TV i've ever seen. I've had fairly high end models before, and known people who had other XBR's, Pioneer Elite Kuro, etc. And i've always been into and kept up to date with current technologies and i've caught myself too many times to count so far, watching this TV, and thinking "holy shit, it's more like i'm watching this actual scene in person or i'm just watching it through a window into the world etc. Especially GoPro footage, it's astounding.
I purchased my TV on December 19th 2014, a 2014 Build built in November.
A seemingly common problem for anyone looking for a 4K TV between the higher end model XBR's, as well as the 7+ series samsung 4K TV's is very bad "flashlighting"
the lighting bleed in the corners.
As well, some have experienced banding. Quite a few people have returned TV's 2-3 times. It's best to head over to AVSForum.com and look at the owners thread of any TV you're looking to purchase.
I paid $1799 Boxing day price the friday before, since then it's jumped back up to $2799 and i think now it may be at 2199.
Anyone looking to upgrade, even though it's a fairly extensive up from say a comparable 1080P TV, say $1400-1800 instead of 800-1200 i'd say the difference is very worth it. And in reality, to get virtually the third best TV sony currently sells for $2100 taxes in seems pretty damn good compared to in 2006 52" Panasonic Rear projection for $3800
Obviously pictures dont do it justice but a few samples
Post your setups, for stereo i have really nothing though an older Philips soundbar that i like. 3D Bluray Player Sony BDPS6200 and apple TV + Shaw HD