new iMac hard drive

[Francine Mack]

I have a 333 mhz iMac with a 6 GB hard drive that I would like to 
replace before I upgrade to OS X. I'm not sure which drive would be 
best. I have tried to search for information but am confused. I would 
like recommendations on the best way to choose and install the new 
drive. I'll probably need to pay someone to replace the drive.  I 
plan to use this iMac for word processing and the internet. I don't 
plan to use any processor intensive apps so 10 GB or 20 GB should be 
sufficient. Comments would be appreciated.
TIA,