I had a Seagate 750GB Momentus, but replaced it with a 500GB Momentus XT to gain the advantage of the small SSD as my MacBook Pro 13 is my secondary machine so I tend to do the same tasks on it. Both were solid.
I've also had good luck with Western Digital's Scorpio Blue line.
thanks all. i've had good experiences with replacement Seagate drives for my lappys but ihavent used the WD yet. any impressions on vibration/noise issues with the 7200 750GB drives from those of y'all that have had experience with such drives?