I am planning to order both boost and wideband gauges for my car. I am wondering if an x pipe is necessary to have a good afr number considering that without an x pipe, or unless I run 2 sensors and gauges, I am only seeing numbers on one bank (3 cylinders)

What do other FI e36 owners do? x pipe? 2 sensors? don't care and only monitor one bank?

I feel like this is something that will drive me crazy, always wondering if I am missing an issue that is hidden because I can't see the afrs from the other bank (maybe I am paranoid?)

Also, is there any hp or other benefit to having an x pipe on a SC'ed e36?