I've owned (and still own) various models of Magnepan speakers. I've used both tube amps (e.g., Sonic Frontiers Power 3 SE, Quicksilver V4s) and SS amps (e.g., Adcom 545, Odyssey amps, and ? - can't remember now) on them. You do need lots of power for Maggies and the model Maggie you choose will impact the power minimums (i.e., 3.6R and 20.1R require massive amounts, while MMGs a lot less) and type of amp (some folks find the ribbon tweeter Maggies more easily sound harsh/strident with low quality SS amps). The best of the lot for me was easily the Odyssey Stratos Extreme monos - warm and musical sound for very little money. Many Maggie owners posting on the Planar Asylum, a very good source for info on this subject, like Pass Labs amps. Switching amps provide the power but the jury is out on whether they sound good. Other factors are your room size (large v. small?) and music choice(s) (rock v. chamber music?). Good luck.