I've had two amps in my system that do exactly what you're looking for although being very different in approach. They are the Rogue Medusa and the Liberty Audio B2B-100 (of PBN design). The Rogue is a class-D amp with a tubed input stage while the Liberty is a more traditional class A/B design. Both are the epitome of transparency with amazingly clear and vivid 3D soundstaging -- significantly bettering amps from the likes of Bryston and a Class A-modded McCormack in this regard. The Rogue has the benefit of being able to fiddle with input tubes to further tailor its sound to your system and tastes. The Liberty counters with a high bias switch that adds a dose of fluidity, palpability, and dimensionality without sacrificing anything. Both are extremely close in overall presentation, but in stock form I'd marginally choose the Liberty in high bias given what you're looking for. But I know Rogue has recommendations for upgraded input tubes that could change things. Really think you couldn't go wrong either way. Hope this helps, and best of luck.