Haha, around here we call it AAD (Airbrush Aquisition Disorder) so welcome to the club
if you don’t like the C cup then maybe look at the B or even the SB.
When I started everyone seemed to recommend the SB and to me it looked as if it would be cumbersome to use so I held off. Long story short, I now own 2 x CM-SB and I wish I'd made the jump sooner, I would have saved some $$. I've seen some report that they feel its awkward to use because the balance of the cup being on the side. I really don't notice any difference between it and my CM-B. Maybe if I was using a their largest cup for an extended time I might notice but most of the time I use their two smallest cups (the one that is supplied and the next size up - I'm to lazy to go check the capacity !)
If you are thinking about doing any sort of detail in the future then this is what I would recommend. I use Createx Illustration and it sprays at a much lower PSI than my CM-B so I can get in closer with less spidering.
I won 2 Olympos brushes a few years back and I tested them against my CM-B & CM-SB, (same psi, same bottle of paint) The Olympos now gather dust in my drawer. I could get much finer lines with my Iwata than with the Olympos.
@DaveG can advise on whether the Olympos accepts the Iwata needles and he also supplies Teflon seals
Good luck deciding which way to go . . . that's why we started AAD.. we got to try them all for ourselves