I'm running a file server with half a terabyte of storage, and I'm just waiting until there's a sale and I have more money to bring it up to a full terabyte. Seagate's a great company for reliable drives (5 year warranty IIRC), but, as stated above, Hitachi, Western Digital, and Maxtor are good choices as well. I'm running two fairly recent WDs, a new Seagate, and a new Maxtor in my file server, along with a 2GB Quantum Caviar (who got bought by Maxtor) and 3GB Samsung that I just happened to have.