Looking for a 750GB TM solution. Might be overkill as a 500 might do as well. I have owned a WD and a Seagate and was under the impression that the Seagates were generally better drives. But I have also heard that the 750s of the Seagates are somewhat noisy and the WD are not. Looking at these 2 drives. WD vs. Seagate Any experience? Recommendations.