Which Gauges to Add?

What do you guys think - I'm buying a Lotek gauge pod (link below) which holds 2 gauges. I'm definitely adding a Trans Temp gauge. Now I'm debating which would be more critical/useful: an Oil gauge or Volt gauge.

Your educated thoughts? Thanks in advance.

http://www.gaugepods.com/toyota_t.html

 

If you tow, oil temp would be smart.

if your into big stereo, I'd go volt's.

 

i tow alot and got a big ssound system i went with a trans and a volt. and i havent yet installed my engine oil temp

 

Ultra Scan Gauge EM would be a good choice too.

 

The first gauge should be a Scanguage. That will cover most of the important items. Trans temp is a good choice if the Scangauge doesn't support it. I also like outside air temp.

 

I have Oil Press, Oil Temp, Trans Temp, and Volt. All important stuff, and I too don't like warning lights

 

Air pressure gauge! Top is for the OBA and the bottom is a digital readout for the right and left rear air bags...

 

OP - what gauges did you end up with?

 

Boost and a/f.