Well, not to play smart, but chances are you're going to discover you actually can sell some of your gear when you first have the ehrlund pre, as it IMHO eliminates the need for further pre-amping.... Only half-joking.
+1 minus the half joking part.
What an expensive journey this has been. I have sold most of my pickups and am about to list a number of things (amps, preamps, and such) that have become unnecessary.