Hi again,
It seems someone has pointed you in the right direction! Great.
I'd say this:
1. FP is a must on a Dodge (but not a Ford or DMAX that are close to stock)
2. Pyro is great to check the temps on the turbo.
3. Trans Temp - only needed on a Auto Tranny that pulls big loads often. Ya, I know I might be flamed on that but it's my opinion.
4. Boost is a great idea if you are trying to get more out of your truck.
5. All 4 on an A-Pillar for a Dodge - I don't think there is a Pod that will accept that. ProPod makes a 4 unit for the Ford PSD. Autometer is just 3 with the speaker (I've got this one).
6. Choice in gauges is personal BUT if you want to match stock try the ISSPRO EV series. Again, personal choice there as there are many brands and prices to match. Autometer, Stewart Warner, ISSPRO, Banks, and so on.
Hope that all makes sense.