From used Data logger on a street truck I have found that cheaper pressure sensors are fairly junk. Either they don't read correctly or quit working after a bit. I found a sensor that is a bit cheaper than AEM or holleys 0-100PSI sensor, but its still $90 each(PPT81-0-100G2). They should also have sensor that go higher pressures if you need them. Its kind of the same story for EGT sensors, I ended up get a amplifier(TCA-MS-K-1) to convert the EGT sensor(EGT-IP-072-0001-SS-N) read out to a 0-5Volt signal. For measuring charge air temp, you could use a thermocouple, but most people use a air temp sensor from turbo car. I am in the process of installing one in mine truck to help check intercooler efficiency. I ended up going with sensor(HT-010204) since its 1/4" NPT, not the more common 3/8" NPT and I had a extra 1/4" bung.
I am running mine threw a Edge CTS2 with EAS system, but depending on what brand data logger you get, you may have a better solutions or options from what I did.