Long time lurker, trying to decide between CommutAir and PSA. Will likely also post this on the C5 site.

As I see it:

Pros for PSA:

Flow, albeit 7 years+
More convenient domiciles (for me in the Midwest)
Better stability as a WO
Relatively quick upgrade, understand at 1000 hrs

Pros for C5:

Better initial bonus structure
CPP, understand not a flow
Smaller company, possibly more flexibility
One plane platform (E145) vs 200/700/900

I appreciate any insight, corrections or additional information.