Vizio UHD TV?

[OI8T12]

I'm in the market for a new TV, and I've been looking at this Vizio UHD TV model # Vizio M55-D0: http://www.bestbuy.com/site/vizio-54...uctCategoryId=

Does anyone have any experience with this, or any other Vizio UHD TV? I currently have 42 inch Vizio that I've had for almost 4 years that I like quite a bit. I didn't have the money last week, or I would have looked at either a Samsung, Sony, or maybe even an LG TV, but my tax return wasn't available until now. All comments are welcome as I'm just now starting this 4K journey along with many of you guys, too. I probably won't have a player for awhile, so for right now, I'll settle for the TV. I know a little bit of what I should need, but I'm not an expert like some of you guys. Thanks.

Edit: After doing more research, I'm now looking at the Samsung UN55KU6300FXZA: http://www.bestbuy.com/site/samsung-...?skuId=5147600