I'm about to purchase a Seagate SATA 160GB Barracuda 7200.7 and was curious if it was worth the $2 extra to get the SATA II version ("up to 20 percent performance improvement over previous SATA..."). I've heard they were a bit louder than the 7200.7 drives. Considering that no single SATA or PATA drive even utilizes all the available bandwidth, does it make this "SATA II" just a gimmick at this point?