Here is a link where the Nordstrand MM pup is tested through a variety of preamps in 3 styles; groove, slap and chords. I believe it's the 4.2 not the 5.2 that's tested, but it might give you some practical info for your decision. You can even compare it to the stock MM pup as it's tested too.
http://basstasters.com/pickups/Nordstrand_MM.html
FWIW, I think they sound very fat yet growly. I'd do it.