I don't know what your budget is, but if you can stretch to around $2600-$3200US you could look for a 2nd hand Hegel H20 or Classe CA-2200, both of which have plenty of power and control to drive your Maggies. Another option would be to look at an integrated solution like a 2nd hand Hegel H300 which would allow you to sell your Rega & get a nice upgrade, whilst avoiding potential issues with impedance matching and synergy between different brand gear.
Amp recommendation for Magnepan 3.7's?
I have a pair of Magnepan 3.7's that I just acquired and currently power them with a Rega Elicit integrated. I am thinking about buying a used Wyred4sound ST-1000 and use the Elicit as a preamp. Before I pull the trigger on the Wyred4sound I am wondering are there any recommendations for producing the best sound from a pair of Magenpan 3.7's?