Looks like a good deal! I personally am not sure if I will ever buy another Galaxy phone -- I have a Galaxy S8. I updated to Pie (I have a Verizon phone) and for the most part I am happy with it, but it hasn't quite worked correctly since. It seems that Android phone makers aren't as interested in updating their phones as they are selling folks a new one. I am especially disappointed in not being able to totally disable Bixby.
I think one of the main problems with Android manufacturers updating their phones is all of the crap and bloat they put on them -- ala Bixby -- Bixby interfaces with every aspect of the phone -- audio, microphone, camera, etc. so it's no small wonder why updating Android is such a PIA. Not to mention, Bixby is always running in the background whether I want it to or not.
I wish you well in your jump to the Pixel 3a. I may well join you...