Hey SammyR690, I've done extensive testing in the past with both WD and Seagate HDD's. WD drives ran cooler, has less drive issues (less data dropped during benchmark tests) than Seagate drives.
The specs of the WD are twice that off Seagate 7.2k drive because of the 6Gb per sec interface plus the 32Mb of cache so even though Seagate spins faster the throughput is much slower. BTW, Newegg has the WD drive for $79.00. I hope this helps..