I have the 65 inch Panasonic VT-50 plasma (from about 2 years ago), and am in love with it, but unfortunately, plasma's won't be made in the 4k version, as I've heard, so plasma's will probably be phased out.

If I were buying today, I'd definitely get one of the 4k TV's and that curved 65 inch Samsung would probably work for me. The curved part is mostly hype and seems to have to effect, so curved or not curved you probably won't notice any difference. It's not THAT curved.