Pixel2 is a bit of an interesting one as it's the first phone to have an eSIM (as well as a standard SIM slot) which will be handy for roaming once the whole eSIM catches on. (Idea being you download a "network profile" piece of software rather than a physical SIM, so the roaming is handled by software rather than by a physical SIM).
Pixel2 doesn't have a 3mm headphone jack, so you'd need btooth headphones or summat.
The following were pretty good review sites used often by the industry:
https://www.gsmarena.com/
http://www.techradar.com/phones