Hard Disk Upgrade

Dun

Ok, my hard drive has been acting up a bit recently, with strange clinks and clanks and the such, so I am looking to buy a new one before it gives up the ghost. Apart from sticking in a Zip drive, I haven't bought any upgrades, so before I fork out my dosh, I was wondering if what I'm looking at is suitable for my machine, and what the difference (if any) is between the two I singled out. I'm presuming (cause I'm almost sure) that it's a 3.5" IDE I'm looking for.

The first is:
Maxtor IDE ATA-133 80GB 7200RPM
- DiamondMax Plus 9 (here) - €105.13

and the other is:
Maxtor IDE ATA-133 80GB 7200RPM
- DiamondMax Plus 9 8 MB cache (here) - €121.30

The machine's a late 2000 Dell with these specs:

Motherboard
Board: IntelCorporation D815EEA
Bus Clock: 133 megahertz
BIOS: Intel Corp. A11 06/11/2002

Processor
733 megahertz Intel Pentium III
32 kilobyte primary memory cache
256 kilobyte secondary memory cache

Current Drive
QUANTUM FIREBALLP LM30.0 (30.02 GB)

Controllers
Intel(r) 82801BA Bus Master IDE Controller
Primary IDE Channel [Controller]
Secondary IDE Channel [Controller]

fisty

bought the first one from komplett a few months ago,
works like a gem and it's really quiet.
technically wise both will work so I wouldn't wory about specs too much.