External Hard Drive Search Frustration. Help

Finally i am set up with a Mac Mini and am in the end days of a trial with Pure Music. I am really enjoying Pure Music and since realizing how much it brings sonically to the table i decided i better get an external hard drive and start burning discs so i can take advantage of this. Well my oh my, just when i think i have found a drive that it seems it may be suitable i end up finding reviews that keep me from pulling the trigger on it. Think i am going to pull what's left of my hair out as well.... ; O

I am looking for a 1TB drive that is Firewire 800 compatible. Also in searching through searches i had read that perhaps 5400 drives are quieter than 7200's? Also that it may not be necessary to have the higher speed of the 7200 drive's for audio, which is what i am primarily wanting this drive for. Want to pick up two drives and have the other for a back up.

Any suggestions and help are greatly appreciated!