Which Solid State Amplifier is Making you Happy?

I'm trying to find a new amplifier to replace a Musical Fidelity A3CR. There are lots of candidates: Rowland 501s, Pass Labs 350.5, Levinson 431/432, H2O, etc. What are people using and what has been a good sonic investment? I'm currently driving B&W N803s, so it's a pretty normal load. My MF amp does not offer enough punch or bass control. It flattens out at higher volumes. I'll spend what it takes, new or used. Less than $8K would be nice. All comments welcome.
Peter