I'm looking to install a wideband guage but not sure who makes the best and most accurate one. I figured the turbo people would be best to ask.

I borrowed a Dynojet AFR [analog] meter and the convert box w/02 wide band sensor. Pretty much flawless.

Lotta good choices here including a portable unit.
I used one years ago when I had my turbo bikes and just stuck it in a tank bag.
The recording feature was a game changer as theres to much going on during a full boost pull to try to watch a gauge.
https://www.innovatemotorsports.com/products.php