I own a pair of Unions, earlier renditions of the Omens, and think you would enjoy them. They are more 'forward' than Maggies (or my Vandy 3a sigs), but seem to reveal a lot more of the transient details.
I think both the Maggies and the Zu would benefit from a sub (or pair).
For me, I would get some subs to run with the Maggies for now.
I currently use a pair of Vandy 2w's and I really like them, though I have heard that the Hsu subs give them a run for the money, especially used.
Should you still have the desire to upgrade ( and who doesn't), you can still pair them with the Zu.
I think both the Maggies and the Zu would benefit from a sub (or pair).
For me, I would get some subs to run with the Maggies for now.
I currently use a pair of Vandy 2w's and I really like them, though I have heard that the Hsu subs give them a run for the money, especially used.
Should you still have the desire to upgrade ( and who doesn't), you can still pair them with the Zu.