FWIW, I have been running AeroForce:
http://www.aeroforcetech.com/products_interceptor.html
I like them a lot when I am not logging with EFILive. When I log, I have the EGT, boost, drive pressure, and fuel pressure analog inputs dual wired into the EFI analog inputs (any sort of electronic transmitter pressure, temperature, etc.). The AeroForce gauges plug into the ODBII port.
They work pretty well. Each gauge shows 2 output selections (user programmable), and has 2 analog inputs. They also have 1 user programmable visual alarm (handy for the EGT's) per gauge. I run the dual gauge system (4 readouts). In addition, they will also clear the DTC's.
The cool thing about these is that you get most of the stuff that is in the ECU, but also have the ability to have analog inputs outside of the ECU stuff that is already there. As stated above, I look at the EGT's, the boost pressure, drive pressure, and fuel pressure from the lift pump.
At some point in the future when I go to twins, I will have to get something else that will allow me to log the intermediate boost and drive pressures....nothing that can not be cured with more $$$.
