On the dash I have twp 0-100 boost gauges, one for drive pressure and the other reading boost out of the intake horn. I also have a 0-60 reading boost out of a boost bolt. I am planning to go to twins this summer, so the 0-60 will end up reading boost from the little guy and the intake horn will be total boost. The boost guages were about $50.
On the pillar I have 0-2000* pyro, $150 ish, trans temp, $50 ish, a used nitrous gauge which also wont be used till this summer, $40 bucks and I really hope it works, and the fourth gauge pod for the pillar is empty for now.
For my fuel/rail pressure I have quadzillas dual digital guage in front of the stock gauge cluster.