"Any hints we should know about?"

- Availability of the chosen MCU during the product life time and its upgrades if any.

- Punlished errata sheets for each of the MCUs if any.

"Things like noise, ref stablility, ect. "

Generally these are documented well and when it comes to organizations like TI and AD you can ( most times) take the data at face value as published. Most cases the product specs. are NOT the limiting issues to achieve a target S/N ratio or stability - it is the user designed items like PCBs, wiring disciplines and other such.

Raghu