I've never had a problem with the .060 stainless tubing cracking and I've put hundreds of hours on it.
The dry headers are only for the real serious who want to mount large frame turbos.
No amount of wrap is going to do the job to keep the heat down enough unless your talking about stuff from the space shuttle. :idea:
Aluminum heat shields are mandatory.
Any of the log type manifolds are only going to mount small turbos.
Maybe that would suit your application OK.
I'm using a Haltech E6K and Mikes setup in the bottom picture uses a Big Stuff.
The Megasquirt has some nice features too.