Try driving on the 20s first if you can. I have those and unless the roads you’re on are pretty good I’d imagine 21s would be a bit harsh we are coastal rural do our roads are trash. The 21s look great just when the sidewall gets that small there’s not a lot of give for comfort ifkwim.
Panroof is lovely and I miss that from the STANDARD on my cheapo MG ZS EV awesome for spotting birds of prey like Buzzards and Red Kites etc