Would a 2 x 18v 20va be ok?
No, this is too low.
I ordered that as thats what i thought you did which covered what i needed?
For Neve modules (24V) with Phantom Power I would have recommended the
POS48PSU, or the
FP48PSU if your plan is to use some relays too. But maybe you have some plans for the negative 24V I don't know.