As long as he gets an ATA drive, and it fits the caddie in his machine, it won't matter. From the description of the drive (60 GB, 7200 RPM) it sounds like a Hitachi though I suppose there are other brands with those specs.
And, n_lande is correct, the faster hard drive won't make any difference in game play, unless there are substantial maps, textures, etc, that have to be loaded continuously. There will be a difference in loading, both initially and in changing terrains and levels or occasionally when the game needs more data. On the other hand, it certainly won't hurt to have a faster drive. If your friend has the bucks to spend and he already has a good CPU, adequate RAM and a good GPU, a better hard drive is the next item in line for improvement. Regardless of anything else, rotating media is going to be around for quite some time and he can always use the drive in a future machine or with an External Drive Enclosure. Its one of the few computer expenditures that really can be considered an investment of sorts.