Depends on how deep your pockets are and what you prefer.
Most go with the Edge Insight CS/CTS with expandable cable for EGT and fuel psi.
Then their is the ScangaugeII, then add 2 analog gauges for EGT and fuel psi.
If your using a Android based phone, check out the Torque App, then add analog gauges for EGT and Fuel psi.
If your rocking a iOS device like iTouch/iPhone/iPad, you can check out DashBoss and add the external ports to read EGT and Fuel psi.
And if you like the old school analog gauges, be prepared to spend some money on enough gauges to match the capabilities of the already mentioned digital monitors.
I run 7 analog gauges and the DashBoss with external ports for EGT/Fuel psi.