Thanks guys for the feedback. I think I'll end up choosing the WD Black. It'll be replacing my main and only drive, a WD Caviar Green 32mb. I'm not expecting dramatic improvement, but I hope to see a difference in game loading/some seconds knocked off the boot time. I believe the WDC Black have pretty decent access times over the seagates too.
My hdd is the only thing lacking in my system right now, so I hope the black will never make me go back lol.
3770k @ 4.4
8gb ddr3 1600 8-8-8-24 2T