My personal feeling on gauges-

Oil pressure warning light and that's it.

If you have time to watch a wideband you're not driving.

 

Thats why you log the wideband and boost.

 

I really like the idea of having only one gauge mounted on the column.

SPA has dual / single gauges that also have audio/visual warnings.

http://www.spatechnique.com

I had the oil pressure / oil temp gauge on my 03 but having replaced it on my 06.