I understand your time limitations, but ask yourself if it is a good idea to make a final purchase that you may or may not enjoy. $4K is lot of money to me, and to many. See if you can work with your dealer(s) to arrange a brief in-home trial, or establish a return period (watch out for restocking fees).
The first time I bought "real" hi-fi speakers, I went from store to store with my CDs, auditioning about a dozen speakers in my price range. I ended up with a respectable speaker, but I never really enjoyed it in my home with my gear. I upgraded every piece of my system until I realized that the speakers I had so carefully auditioned were just not for me.
The second, and I suspect final, time I bought speakers, I followed a long thread on the brand here on Audiogon, in which users’ descriptions seemed to mirror what I was looking for in a speaker. Since the manufacturer sells direct with a 120-day in home trial, I could listen to them in my home, with my gear, and decide. I would lose only the shipping charges if they did not work out. Well, it was a home run. The speakers did indeed sound as the posters in the thread said they do. I have now had my Ohm Walsh 2000 speakers for seven years, and still enjoy them immensely.
That said, I have heard the G.E. Triton 3, and I was extremely impressed - excellent smooth highs, clean, open sound, with a near-holographic soundstage. I thought the bass was excellent with the powered bass drivers. The speakers dissappeared into the sounstage, which is one reason I love my Ohms. Now, this was at a dealer who knows how to do set up. But, eve so, they were being fed with modest NAD electronics (a surround AVR, IIRC). YMMV, but I really liked the GEs.
As for the Zu speakers, they are not for everyone. I know people who swear by them, but I have yet to really enjoy the sound of any of their speakers, and that includes the Dominators ($40K/pr) run from a top-shelf front end and sources. It's a matter of personal preference. But if you're willing to eat the shipping, it might be worth it to find out.
But, please, see if you can have a Plan B before you make a final purchase.