Levchappy,
Might I ask why you and your wife are considering the change?
Not trying to step on any toes, but Levinson equipment is usually compared to the likes of Krell and Pass, whereas Emotiva equipment is usually compared to the likes of NAD and Rotel. Two completely different classes.
Emotiva equipment is typically reviewed or considered, in light of its cost, as being a good bang for the buck. On the other hand, Levinson equipment is usually review as being good equipment with its cost just being what it is.
My point is that each is good at its price point, but they are in different leagues.
I've never heard the XPR amps, but I have listened to systems built around Levinson equipment and it is good, without qualification.
Simply looking at the specs of each amp kind of tells me that the Levinson is also the better built amp, in spite of the fact that it is rated at less power.
If memory serves, the Levinson is rated at 300 wpc at 8 ohms, 600 wpc at 4 ohms and 1200 wpc at 2 ohms. The Levinson is actually rate down to 2 ohms.
The Emotiva, on the other hand, is rated at 1000 wpc at 8 ohms, 1750 wpc at 4 ohms and according to Emotiva, 4 ohms is the minimum load.
I just looked up the specs on your speakers. They have a nominal impedance of 4 ohms and looking at their impedance curves indicates that they spend a lot of time approaching 2 ohms. I really don't know how this is going to work with a massive amp that is only rated to 4 ohms. Maybe it can deal and maybe it can't.
Really, it seems to me that the Levinson is a good match for your speakers.
Personally, if you just have the upgrade bug, considering the equipment that you mentioned, I'd be looking at upgrading either the pre amp or the DAC.
I have an XDA-1. It is a nice DAC....for the money, but it isn't the last word in anything. The same can be said of the pre amp.