My ultimate piece of gear would be a live acoustic space where no amplification is necessary and just the right amount of reverb is naturally present. I've sung and played in just a few, and it's a fantastic experience. But they're hard to find. By the way, during 7 years of voice study I was trained to sing and project my voice in an acoustic hall with no amplification - that helps.

Recently I was at a concert where a 5-person band was playing in a reasonably good acoustic hall, but with all sorts of gear, every instrument plugged in and vocal mics for everyone. But toward the end of the concert their gear began to break down - sporatic loud clicks and cracks. They decided to go totally acoustic for their last set. They sounded much better, and they remarked how much more freedom they had. I think it was a totally new experience for them.

Cheers, S. in Seattle