Rbf,
Here's the good news:
You're about to experience omnidirectional loudpeakers - and very fine examples of the breed, as it happens. I think almost all listeners are initially struck by the unique spatial presentation characteristic of this design approach. IME, many people immediately fall in love with it, but a few do not. Since the Ohms are sold with an in-home/money back trial period, you'll quickly ascertain which side of the fence you fall on, with limited economic risk.
As to some people bailing after enjoying the speakers for a period of time, well....welcome to the world of audio hobbyists. There are many different ways that manufacturers "skin the cat" and no single approach covers every base. After some period of time, it's not uncommon to want to try something a bit different than what you've been living with...even if you've still got a good thing going.
There's always a certain excitement inherent in something new.
In your case, at the moment, your new relationship will be with the Ohms. If it's a fling, send 'em back. If it feels like a keeper, keep 'em. As to whether or not that lovin' feeling fades over time, I suspect that you'll just have to wait and see.
Congrats on the purchase!
Marty
(Now going on year 5 with Ohm 100s and not looking around, except for the ocassional glance at MBLs).