random air compressor fitting question

[daredvl22]

I have a Quincy 5 hp. 60 gal. air compressor with a 3/4" air outlet. I'm going to install a standard 3/4" brass ball valve between the tank and the SS vibration isolator. My question is this: I need to install a short (maybe 5") threaded pipe to screw into the brass ball valve and the air compressor. I was going to use a galvanized pipe rated at 150 psi, but I wasn't sure if I should be using the same 3/4" pipe in brass. Does it make any difference? Just curious, it probably doesn't matter either way. Galvanized is about $2, and brass is about $10.

Thanks,