Since you are planning on coming off of acidic forms of sanitizers (tablets and MPS), your pH rise is going to be more dramatic. I would suggest you adjust your TA up to 50ppm and then consider adding 50ppm borates to your hot tub. Borates will act as an additional pH buffer where their greatest buffering capacity is at high pH. This will slow the rise of pH from CO2 outgassing caused by the air jets. The downside to adding another buffer to your water is that adjusting the pH will require a larger amount of acid BUT, because the pH rise will be slowed, the total amount of acid used over time is the same. There are stickies on the forum on how to add borates to your water. I find using boric acid the easiest method and my swimming pool always has 50ppm borates in it. Borates will also soften the water and give it a "silkier" feel. Because borates keep the pH from getting too high, calcium scaling is also less likely and that is the main culprit in hot tub heater failures.
Its up to you but you should be aware of the pH issues you're going to run into.