I have tried Hegel with many, many speakers (Totem, Revel, GoldenEar, PSB), but the best synergy I've found is with Amphion from Finland--especially their Argon series (Argon1, Argon3, Argon7L). These work so well together that it seems they were designed for each other: the Amphions showcase the benefits of Hegel's SoundEngine amp design better than any speaker I've heard, and the Hegel elevates the sound of the Amphion (which is already superlative) to levels of resolution and transparency that rivals anything I've heard. Simply a wonderful pairing.