I’m confused now. The Solo3’s are your daily drivers right? Then why don’t you use your HD1 when you think they’re better despite the Beats having the W1 chip?
Wait so for you it’s Solo3 > HD1 > Studio3?
In terms of sound overall it’s HD1 > Solo3 > Studio3.
Though due to the usefulness of the W1 chip I do use the Solo3 more than the HD1. I wouldn’t use the leather of the HD1 at the gym which contributes to that as well.
I think you’ll be fine with either the 4.50 or the Solo3. Based on what you’ve told me I think the 4.50 is a better fit due to the Sennheiser signature and ANC.