I've got 6 Maxtor LVD drives in my box. They're great
http://www.maxtor.com/en/products/scsi/atlas_15k/
http://www.maxtor.com/en/products/sc.../atlas_10k_iv/
had a lot of problems with IBM. Four drives faile after only 1 1/2 years. And IBM drives heat up like crazy.
Maxtor is very silent and doesn't have the heat problem.
If you buy new equipment then go for U320. You can plug all SCSI stuff there and if you use a lot of HDs (>3-4) then your throughput will be always amazing). But you can use 320 drives on a 160 card as well.