Coming from a Plasma, an OLED is the obvious choice.
However OLED isn't for everyone and keeping your current TV may be a better option.
Do you have any 4K sources?
If not then keep your current TV, unless you want a size upgrade.
Do you still watch a lot of Standard Definition TV?
If so then keep your current TV, unless you want a size upgrade.
What I would do is stop paying that monthly insurance scam/charge and put the money aside for when the TV does go pop or you decide to change it.
Buying a TV is a hugely more complicated choice now. I'd suggest before you even think about changing your TV to have a good long read of the TV forum mod's guides, especially FHD vs UHD, Thinking of replacing your plasma, LCD vs OLED and well... really most of the others.