Save your and maybe your motor, and don't get them. I would look into something better, Stri, AEM or Defi if you have real deep pockets. These will cost more but work much better.
As for what gauges to get, we will need your mods. I run the AEM wideband UEGO and the TRU-BOOST. I would like to add the oil pressure and temp and water temp. If your are running a Air/Fuel you don't need EGT, if the A/F is right than the EGT will be right. The A/F gauge is only worth getting if it runs a wide band O2, if not get the EGT.
Why do you need a 60 psi boost gauge?