I really don't think that the autogage's would be any less accurate than the autometers; they just don't look as nice, hence the difference in price. If I were you though, I would go with electrical guages. Much easier to install and you don't have to worry about stuff leaking in your car.
yeah, I thought about that, but I was told that the mechanical gauges were more accurate. To be honest, I like the simple look of the auto gauge series pieces, some of the other gauges look too flashy to me. I think I am going to get these, though. I will just yank them from the bezel, since the kit is cheaper than the individual gauges. I think they have one with a voltmeter instead od an ammeter, so I am going to get the voltimeter.