Ok, I didn't know you could with the shift air. I'm planning on getting a 3070.
Ahhh the Shift Air... Lol I missed that. Regardless, a 120mm AIO is a better option when the only air cooler alternative is a slim cooler (with regards to cooling performance). Worth the price increase for sure in this case. I opted doing this for my SFF ITX build, my H60 easily outperforms my slim cooler (Cryorig C7).
Typically 120mm AIO's are not recommended where a tower cooler that's half the price will outperform it, but that is not an option in the Evolv Shift.