I asked a similar question in another thread, but the thread topic wasn't right so I had a lot of good responses, just not on the topic I was looking for!

I am replacing my coil. I want the best one possible. I have read about brands (Carrier, Trane, American Standard) and material (Stainless Steel, Copper, Copper+Tin). What is the best coil you have run into? Very open-ended, I know, but we all have different reasons for liking things.

Also what is the best material? Stainless or Copper+Tin (seems Copper alone is problematic)?