I need to get myself a pyro setup. I know this has been covered lots before, I've searched, just want a final opinion.Was looking at the Glowshift gauges...they sell a few different colour gauges with thermocouples for $100. That's what I'm leaning towards. Are they good to deal with? Also what's the deal with the lights on these things...do they change colour as the gauge goes up?Also heard the names VDO, stewart warner, autometer, and aircraft spruce...what do guys recommend?