I only need the three axis. xyz.

Why do you say closed loop is misleading?

Hypothetically if I did need to upgrade, what would be a suitable setup? Now I do realise that the quality of cnc equipment lies on a very broad spectrum of quality standards and that there are unlimited combinations available, making my question nonsensical to seasoned veterans here. However.....in my situation where I will be cutting exclusively wood (soft and hard), possibly a few hours a day, on a sturdy metal frame with 15mm ball screws attached - what would a proper setup look like?

4 x Nema23 closed loop. (2 for X, 1 for Y, 1 for Z)
AXBB-E controller with accompanying software.
2 x Power supply ( 1 for X and 1 for Y and Z)
Controllers (Do I need 1 for each motor drive?)