Where do I go from here ? Spectron Musician II

I running Magnepan 3.6's with a Spectron Musician II. This amp puts out good base but the mids and highs are very strained. My question to fellow Goners is where do I go from here? Parasound Halos or what else could help my situation. I really like black finished gear but Parasound is only available in silver. Any relies would be very helpful! ............