Align & More
I'd keep the AM wheels on for the alignment. Balance only if you need it (feel it vibrating.) My advice, find a shop that only does alignments, not some kid who can line up the arrows on a Hunter unit. If your AM wheels are wider, the scrub area has changed due to the increased width. Height of a wheel is of no consequence. Your OEM optimal angles may no longer apply. It takes an old hand to nudge your toe just enough for even wear on the new, wider tires.
If the tires need balancing, insist on seeing the printout to confirm 0.00s. And if too much weight is applied, also insist that the whole assy be match-mounted to the wheel. This puts the heaviest spots of each opposite each other (less weight on the wheel.)
If you can, use nitrogen instead of air. I used to poo poo this until I saw some real world tread life. That stuff works and it's not as susceptible to leakage through the rubber and will maintain proper inflation longer. But one top off with regular air will negate the cooling effects. Refill with nitrogen only.
Just how I'd treat my mom's ride.
Bill