|The link below indicates your desktop came with up to a EIDE type (IDE ATA) of up to 160GB. This tells me that you should not have any trouble installing any IDE 3.5" internal drive of any size. Below is a link for an excellent site to buy from if you are in the US or Canada. |
I filtered the list to only include IDE and only 3.5" 7200RPM. I prefer Western Digital drives.
Look at the other specs such as buffer size 8-32MB for that list. average seek time and warranty period. You access all that by clicking on a selected drive. Also look at customer reviews.
You should be able to install as a second drive or replace your original.