up grade

I am using a itaste vv 3 at the moment and I love it. I am not going to buy anything yet but I am always looking ahead. What would be a good up grade from this one to another. I don’t want a box type one and I am not a person who fools around a lot with different watts and stuff to use them. It would just be easier for me to get a kayfun tank that is not a mini. A regular kayfun would look stupid on top of mine now. So any advice would be helpful for down the road.
Thanks for any help.

Fatal error: Uncaught Exception: 12: REST API is deprecated for versions v2.1 and higher (12) thrown in /home/thevapes/public_html/wp-content/plugins/seo-facebook-comments/facebook/base_facebook.php on line 1273