The autometers are more accurate than the stock gauges, isn't that what you are paying for with them? Does it really matter where the gauge gets its information, i.e. the stock sender? I just replaced the temp sender when I did the intake swap so I'm sure that's fine.
ive got it in my car and love it. it has laser etched idiot lights and indicators in it. its made out of aluminum and available in a variety of finishes. it doesnt have the cheap plastic look and feel of the florida5.0 piece. with the cheap little indicators. The mc machine plate also has the oil/brake/engine lights available.
you do have to trim the dash. but installation is pretty straight forward if you can run a basic wiring circuit. i put my setup together pretty cheap because i took the mechanical oil/water gauges out of my pillar pod, bought a new(but "used) tach and speedo, and then bought the volts/fuel gauges from my local speed shop. i also sold the monster tach.
you will be happy with either, and they are both very nice pieces. you can splice/tap into the stock harness for all the gauges if you want.
If you opt for the mechanical gauges, then you have to run the senders and stuff, of course... I know that for sure. So I'm pretty sure I'm going to pick the mech. temp and oil with my cluster