Remember that your new MBP will have USB-C ports and you may need an adaptor for a mouse with a conventional USB connector. Like this adaptor:
https://eshop.macsales.com/item/OWC/TCCADPU3/
Shop around. Some USB-C adaptors can cost twice what a third-party mouse costs.
I use a bluetooth Apple MagicMouse with my MBP. It preserves most of the functions and handy "swipe" moves from the trackpad. And you don't have any port issues.
The current Magic Mouse 2 is not cheap but will provide many more functions than the third-party stuff.
https://www.apple.com/shop/product/MLA02LL/A/magic-mouse-2-silver?fnode=56