CompUSA brand (rebadged Maxtor DiamondMax Plus) 80GB, 7200 rpm, 8MB cache, ATA133
Reg: $129.99, Sale: $99.99 – 30 MIR = $69.99
$0.875/GB @ CompUSA
Western Digital brand 100GB, 7200 rpm, 2MB cache, ATA100
Reg: $149.99, Sale: $139.99 – 30 MIR – 40 MIR = $69.99
$0.70/GB @ Circuit City
Link to product seems to have changed since Sunday. Search for WD1000BBRTL if you have problems.
Both the same price. Trade off between the drive capacity and cache size.