What makes a good gauge is one that tells you when you are in trouble.
It should be visable without having to take your eyes off the road.
Visable under all light conditions.
Quick glance will tell you if you are in trouble and were.
No need to be accurate. Putting a high accuracy gauge into a CJ, when best viewed from the passenger seat, in a CJ is just silly. You have parralax error a minimum and trying to read an oil pressure gauge in a CJ is just as dangerous as texting while driving. If you want accuracy, go digital. If only they didn't make them so geeky.
I think YJ's have a great gauge layout and anyone interested in gauges probably should look into putting a YJ dash into thier CJ.
I love the pods DieselSmake makes but a little leary about what my passenger might hit against in case of an accident. If Diesel Smoke makes a mold of his pods and makes the corners smoother and built out of rust proof fiberglass that will crush under impact. He will have a winner.
I also like the ones that mount on the window pillars. Putting them under the dash is also silly. HUD's would be great but not enough angle on the window to make it work.
Mount your gauges so that all the needles point straight up when everything is running normal. Makes it easy to find the one pointing out the problem.
I realy like idiot lights or a klaxon that will sound off if you have a really serious problem.