8 ohm nominal impedance/4.69 ohm minimal impedance--is this a bad load (on paper)?

4 Ohms or higher is usually "easy to drive" as even inexpensive integrated amps usually support 4 Ohms.  The combination of phase angle and impedance matters so it may require more current than apparent, but 4.7 is a pretty good speaker.  Honestly it's hard to find speakers that don't dip below 4 Ohms at least somewhere. 

On paper, a 4 ohm load is reasonable. BUT it all depends on your amp. The amp must be able to deliver sufficient current when the 4 ohm load is hit. I’ve seen name brand receivers shut down and poorly designed tube amps, with insufficient output transformers, severely clip under a 4 ohm load. So check your amp’s specs before you buy the Revel M126Be or any speaker.

+1erik. The minimal drop of 4.7 ohms is not unusual for a 8ohm nominal speaker.