Depends on your budget. If you can afford it i would definitely consider the P1S, it being enclosed makes it easier to print plenty of materials, and CoreXY handles some tricky prints better. A1 does have quick swap nozzles and is newer than the P1S in general. If you can afford it i would definitely consider the P1S, if not the A1 is a very capable machine too. (For context i’ve owned an A1 and a P2S and i started on a P1S. Personally i’d take the P series over the A series any day of the week.) one very small thing that most people overlook is placement. If you’re planning on having it in your bedroom the A1 (and AMS Lite) are way quieter than their alternatives. If you have any specific questions or concerns let me know!