Gday!
My experience!
1.2 GB Seagate - Working 8? years, but not used much anymore. Was used in my a1200
8.0 GB Western Digital - Working bout 5-6 years? but is very noisy now, was used in my 1200 and 4000. The 8GB was harder to get it to recognise in the 1200 than the 1.2 GB
and the 4000 wouldn't boot when it was cold!!
40 GB Seagate - Working 3 years - PC
160 GB Seagate SATA- Working 1 year - PC
200 GB Maxtor - Working 3 months - PC (external)
I have been very please with seagate and tend to stick with that where possible!!!