Let's talk about brake fluid

[secondchance]

ZR-1 guys are pretty meticulous about all fluids going into our cars. Right?
We are periodically having serious discussion on engine oil (brand, ZDDP content, etc.), tranny fluid, differential fluid, engine coolant (green stuff, Dexcool, even Evans).
What about brake fluid?
Our cars came with DOT 3 fluid and that was about 24 to 29 years ago. Been awhile, huh!
I use to use Advance Auto Part off the shelf DOT3 such as Valvoline, Wagner, etc. Then about 3-4 years ago when I modified my brakes with Wilwood calipers/rotors, I asked Jim Jandick and he recommended Wilwood EXP 600 plus - DOT 4 fluid with high boiling point.
As I looked into the subject, I find DOT 4 stuff is good from boiling point but not so good when it comes to longevity due to faster water absorption.
Now we have DOT 5, silicone based fluid not to be used with ABS, and DOT 5.1, glycol based similar to DOT 3 and DOT 4, which can be used with ABS.
As I was getting lost, I called Wilwood and talked to their rep. Took awhile but he confirmed Wilwood High Temp 570 is DOT 3 but would not answer service interval - understandable.
So, the question is what do you guys use? I know most ZR-1s are occasional use cars and often put away for the winter. Also, we might have a chemical engineer or automotive engineer among us.
Any thoughts?