What I did was go with Aeroforce dual gauges:
http://www.aeroforcetech.com/products_interceptor.html These have EGT's to 2000*F, and you can get pressure transmitters that go to 100 psi.
Aeroforce are round gauges with 2 digital displays per gauge. You can get a single or dual gauges. I think they made a custom triple gauge setup for someone here, but I read that.....
Aeroforce gauges plug into the ODB2 port and will display a lot of stuff that the ECU is monitoring, but you can never see for example rail pressure desired and actual. The EGT and pressure transmitters are analog inputs to the Aeroforce. I made a 2 wire pigtail so when I log with EFI, I plug my EGT and pressure transmitters into the analog inputs on the V2. I am currently looking at some Isspro stuff so I an log other parameters outside of what is available from the PID's or my current analog outputs.
The down side with Aeroforce is that if you are logging with EFI, you do not have the Aeroforce gauges. It is usually not a big deal, because you can setup the display gauges on EFI to look at what you want.
If you go with the Isspro Promax system (which is what I am looking at), it becomes a bit of a headache if you are trying to line up the data logged with the V2, and the data that comes back from the Promax.
Non of these systems are cheap, but the price goes down a little when you think about buying multiple gauges.
