TODA is the daddy.
Spoon is still pretty restrictive and is designed for race, so its gives up a little bit of low down grunt (ft-lb) for top end BHP.
DC Sports header is another good header, don't think it puts out as much power compared to a TODA but it's pretty close and is a lot cheaper.
Dotty has a FEEL's which is getting mapped soon, I'm looking forward to seeing what that puts out as they're pretty rare and it looks quality.
AFAIK Tegiwa, made a copy of the TODA race header, then made a few adjustments to it and now sell that as their best header.