Hey, Chris, alot of good questions, I'll do my best.
1) Yes I like the gauge and would not have choosen any other, for my needs. It's really a personal question at to what floats your boat. I have both analog and digital, I like them both.
2) Mine are on the dash, with the exception of the SPA, which is below the dash near my knee. Not a good spot for a FP gauge IMHO, difficult to read at WOT runs. If you click on 'MY Truck' below, you can see my dash gauges. Probably not for most, with the single pods, but again, that is the way I wanted them. You can also purchase a gauge pod that will fit next to the windshield, in the center of the dash, for a less 'caveman' approach. I've seen plenty of members with this set up in a 3 gauge pod and assume they also make them in 2 gauge pods. I wouldn't sweat the wires, I was able to fish all of the wires to the gauges that you see on my dash by the edge of the drivers side dash, adjacent to the pillar, by using a coat hanger and coming up from below the dash, one wire at a time. No drilling required. Remember, the 90 degree elbow on the SPA's does come apart, so it's only the wire loom that you will have to contend with.
3) Already answered above.
4) Fair and competitive price @ Performance Diesel, with great customer care, here's the link... .
http://www.performancediesel.bigstep.com/category.html?UCIDs=578092|579181
Hope I helped !!!
Scott W.