Over the years, on my SL3s I've run an old Adcom GFA-585LE (only until I bought something else), the Threshold T200, an early Edge, MacCormack DNA 1, and currently the Muse Model 300 monoblocks. Only the Edge continually overheated and wouldn't run the speakers (gave it back). Even the 100w T200 had plenty of stuff (although it was a tad bright I thought). The Model 300s (300w/500w) work fine and are the best I've had for bass response. Good luck.
