Hero3+RTK base

Please guide me to choose one of the following two hardware.

1- HEX/ProfiCNC Here3 + RTK GPS
The manufacturer (HEX) says it does not work well with the PX4. Do you approve professionally?

Which are stable and have no problems with the PX4. Because we are going work on outdoor navigation, we want to choose the right hardware. It is also important to be fully compatible with the PX4 autopilot.

3- Also please guide me for select cube orange set(pixhawk2). Is this hardware the best choice for PX4 + RTK ? can we rely on it. we only worked with old versions

@Tony3dr @dagar @rroche @thomasgubler @sjwilks @LorenzMeier @TSC21