what are the best dispalays

I see a lot of those mcufriend, I got myself a few 3.5 and 2.8 inch from ebay.

After playing around to find the right driver I got all of the working with less or more hassle. The other problem that they do not have web site in English.

I wonder if there is another like local supplier I could consider.

Nextion is a good choice , though their documentation is crap. Search Arduino Nextion My way under this forum for some background information
As it requires only serial port leaves other IO for other items. If you are using UNO then you have only one port so you will have to disconnect to load. Software Serial works but my experience is to use a hardware port. I do most of my development on Mega