+1 bigger is better
The 9002 is kind of small... I don't think it'll be a good long term choice for your tank. I bought one for my 15 gallon + 10 gallon sump. Right now I'd hesitate to put it on a larger system... but to be honest, the system isn't up and running yet, so I might eat my words
That's a 1" bulkhead for size reference.
How about a 9010? There's one FS right now...
http://canreef.com/vbulletin/showthread.php?t=56383