Do you really need the pro? I mean, I got a 2nd hand Pixel 8 for a little under $450 last month and am perfectly happy with it (my last phone was a OnePlus 7t). It will get the same support as the Pro for much cheaper...
Also the size. My "a" was already at the edge of being usable with one hand, while Pro is even bigger. Plus - the "a"s don't have glass backs, unlike the Pro and even the normal ones.