I have all three, and my opinion would be the original rubber one, which is the most comfortable and look most natural for daily and sporty events. The mods are great and give a vibe of a royal oak, but the casing is thick and heavy, I wont suggest getting one unless you have a 6.5inch+ wrist size to carry it.
totally agree with you regarding the body ratio, I too felt like the 40mm might look abit toy ish on me and slightly too 'implicit/veiled?' with the 35mm.
I'm heart for a 38mm as well, wish they have that as an option instead of a 40mm in the first place. I know many people hesitate in getting a PRX just like me bcz of its size.
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