I think it's normally :

- get a rough idea of cabinet style/size/goals

- pick driver

- design cabinet

The detailed design would probably have to be driver first, in the sense that you have infinite freedom with cabinet size, type etc... and can even tweak things like port depth after construction but with drivers you have to take what you can get.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8