Hi

I was wondering how my computer would act with 2 hard drives in it
Watch out for overheating! I assume that your new drive will be 7200Rpm. If you are installing into a tower, try not to put the two drives together, but leave a space.

Also, look at installing a cooling fan for the drives, or at least improving case ventilation. I usually use a specialist HDD mounting with fans in it, and a large "exhaust fan" at the back....these are the ones that fit into a PCI slot and clear 40+ Cubic feet a minute.

Cheers