I'm no pro myself but I did lots of reading and research before I bought stuff.
If you're worried about the EK corrosion then get the copper or Plexi or Acetal Copper versions. The copper does tarnish though so when you remove the block it'll look dull and nasty maybe but that's on the CPU side. Bit of metal polish will shine it up again.
The airflow description makes sense, I suppose if all the intake is coming from that 120mm then I'd put a sort of filter on it like a front one would to stop it sucking in lots of dust.
As for the pump as long as there's airflow passing it it'll be okay. It's when it gets in places where it heats up with nowhere to go that will make it run hotter and could shorten it's lifetime.
If you're worried about the EK corrosion then get the copper or Plexi or Acetal Copper versions. The copper does tarnish though so when you remove the block it'll look dull and nasty maybe but that's on the CPU side. Bit of metal polish will shine it up again.
The airflow description makes sense, I suppose if all the intake is coming from that 120mm then I'd put a sort of filter on it like a front one would to stop it sucking in lots of dust.
As for the pump as long as there's airflow passing it it'll be okay. It's when it gets in places where it heats up with nowhere to go that will make it run hotter and could shorten it's lifetime.