Personally, I've been reconsidering my facination with "smart" TVs. All my devices already have connectivity...why do I need another device that can do netflix.
But they are still really cool!
Personally, I would base the purchasing decision purely on the quality of the display, and possibly the sound (assuming you're not going to use external speakers), and ignore all the "smart TV" crap.
I recently bought an LG TV with lots of "smart" features which looked absolutely amazing on paper. However, the software has all sorts of extremely irritating hidden limitations not mentioned in the marketing blurb. For example, everything you record is locked down with DRM, even the free to air stuff. Also, you can't record to a FAT/NTFS formatted drive. You first have to reformat the entire drive to some obfuscated Linux format. Presumably this is just a ploy to make it harder to remove the DRM from the files you've saved. But it makes the recording feature totally useless to me. Unbelievably, The TV also sends usage statistics back to LG's servers without your permission! After a lot of bad publicity, LG have promised to fix this "feature" with a future firmware update. But I'm not taking any chances. That TV is going nowhere near my network.
Anyway, the moral of this story is that you're far better off buying an external no name brand Android or Linux based box for your smart features. They're dirt cheap, will play almost any video format, and won't come with all the DRM nonsense that the big name brands try to force on you. This is one situation where it's actually a disadvantage to buy a branded product.