the seagate 1.5tb drives have performed very well for me. also, remember to get 2 so you can backup your drive. don't be fooled by the drobo, raid, etc... always have a backup. also, for macs, use firewire 800 if your mac has that capability.
btw: a ssd will not get you better sound. there are a few people that will tell you that certain hard drives will get you better sound also. the ssd's that you can install in pc's/macs are the cheaper ones that will wear out much faster than a hard drive. the better ssd's cost over $10k for a few hundred GB's, the ones for a few hundred are the cheap ones. what ssd's will get you much faster access to the data, faster writes, great for databases with a large # of users, a waste for music (for the price right now). the IOPS/MBPS requirement of reading from a disk for music is quite low also.
btw: a ssd will not get you better sound. there are a few people that will tell you that certain hard drives will get you better sound also. the ssd's that you can install in pc's/macs are the cheaper ones that will wear out much faster than a hard drive. the better ssd's cost over $10k for a few hundred GB's, the ones for a few hundred are the cheap ones. what ssd's will get you much faster access to the data, faster writes, great for databases with a large # of users, a waste for music (for the price right now). the IOPS/MBPS requirement of reading from a disk for music is quite low also.