the x5sa PRO.
https://www.amazon.com/Printer-Struc...011088&sr=8-10
Upgraded linear rails from the non pro.
In fact a lot of other little, but significant upgrades as well.
Plus it's pretty much bang on your size requirements.

lol I suspect if you gave autowiz a fixed budget. He would stick to it rigidly.
You probably wouldn't get any change, but you would get the absolute best parts that could be got in that price range.
Built by a man who REALLY understands how 3d printers work :-)