No, avoid the 6000-series. It won't last 3 years before it kills itself.

Any other TV in same price range?

I'll tell you what I tell everyone who comes into the store expecting a 55" 4K HDR TVfor under $1000;

Save more money. Buying this isn't "saving money over a higher end version", it's "losing money by buying the bottom of the barrel". You'd be better off saving more money and waiting for the refresh in April.

EDIT: Even if you aren't worried about HDR, consider going a step up to a x700D or a KU7000. the KU6300 (and it's international equivalent, the KU6000) are ticking time bombs just waiting to die.

Well aren't you a bright and happy ray of sunshine that thinks the best of all companies and thier intensions :-p

After doing research I bought the Samsung KS8000, it's nice, better than the Sony 850, but a bit more expensive.

Yep. 

It's a good TV despite its flaws. I would still put an extended warranty on it, though, you'll almost certainly use it.

The TV worked fine the first year, then with an update I noticed the problem with the CI+ module and this last year the Netflix app started acting up. I'll just use Netflix from my other devices, it's just so much more convenient to do it straight from the TV (first world problems xD)

I think the W6 series is midrange level. The main features I liked from the TV was the design, upscaling quality, no 3D and price (later on I found out about its awesome low latency). But like Azuren mentions, maybe it wasn't the best time to buy Sony back then... but it's such a shame to see good hardware let down by crapy software, either way I'll continue using it just as a screen.

I see, my 46LED doesn't have Netflix nor skype. It isn't considered smart (internert only through cable), good image, no FW upgrade. And the new 65" is very good so far. But I can see theses FW problems ruining your experience, it really is sad. And probably out of warranty right?

Correct, two years warranty here in Europe, already passed. And I think we can only return items, no questions asked, for the first month.

Either way, pretty sure you can't use the warranty on a faulty app or weird firmware updates.

In Brazil we have hidden defects policy that theoretically doesn't expire... sometimes if you make enough noise they can solve it for free or right fee since it's a problem caused by their QA not assuring the FW update wouldn't fuck up TVs.