Would appreciate some recommendations.

I'd appreciate your thoughts on new amps and a line stage. Looking to go with tubes, and let's pretend that cost is not the primary issue. My speakers are Dali Megalines. On the front end I'm using a couple tt's (Forsell Air Force One and Micro Seiki sz it) and an Esoteric X0 cd player.

The Megalines require 4 channels. I'm currently driving the bottom end with a Krell 600, which I'd like to improve upon and the top end is temporarily driven by an old Carver that I had lying around. Preamp is a Krell HRC (I'd like to replace this) and an Aesthetix IO for the phono.

Any recommendations for new amps and a pre-amp would be greatly appreciated.

Thanks.