Hard drive for unibody 17" MBP?

[jjfcpa]

I'm expecting my unibody MBP in a couple of days and I want to swap the hard drive for a 500 gig. The big question is, should I go with the Western Digital 500 gig (5400 rpm) that I bough a couple of weeks ago or should I wait for the Seagate 500 gig (7200 rpm) that is currently out of stock?

 

[DHagan4755]

My only concern is the vibration.

 

[Minimoose 360]

I have the 7200 RPM 320GB one and there is a little humming feeling on the left hand rest but I wouldn't call it vibration...