C loading depends on what the cartridge spec calls for and then you have to account up the C in your arm cable, and then add in whatever extra you can on the phono stage to make it equal to what the cartridge spec is. Since you probably don't know what the C of your cable is and Rega doesn't publish a spec for the recommended C, your best approach is to try both 100 and 0 pF. See if 100pF sounds unbearably bright compared to 0. Or maybe 0 pF sounds dull compared to 100 pF. Or maybe you won't hear a difference. Impedance at 47K is probably best.
BTW, I dont think there is such thing as an Exact 2, only the Exact, even though you see references to the 2 on sites like Raskin's. Personally, I'd get anything but a Rega MM cartridge. I'd wager if you looked up all of the users experience posts with rega pickups from all the boards you'd find the consensus is they are not very good performers or value for money.
BTW, I dont think there is such thing as an Exact 2, only the Exact, even though you see references to the 2 on sites like Raskin's. Personally, I'd get anything but a Rega MM cartridge. I'd wager if you looked up all of the users experience posts with rega pickups from all the boards you'd find the consensus is they are not very good performers or value for money.