I still say this is the absolutely best deal for hard drives.
I have two of these on RAID 0 and they run brilliantly. They are so very quiet I can't even hear them. And they load maps almost instantly and install things crazy fast.
Definitely the best bang for your buck if you get just one. But if you want to go a tad over your budget and get 2 of them in RAID 0 it will be so much better. RAID 0 is simply so fast, I don't think I could go back to a single hard drive. If you had 2 of these on RAID 0 your total storage would be about 149GB after conversion to computer gigabytes.
Also I have tested on sisoft and I compared it to the hard drive in my sig. For less money than one raptor two of these in RAID 0 will outperform it in most tests, plus has way more storage.
Or if you are the paranoid type you could also RAID 1 them so that you don't have to worry about losing all your files.
edit: Oh and the deal is even better now! I had to pay $5 shipping for each, now it's free. So if you got two of them it would only be $116!!!!! Great deal!!!
edit #2: In case you were looking at the seagate and wondering about why this one says Serial ATA and the seagate says SATA150. Well don't worry I checked out the specs on this hard drive and indeed it has the latest SATA 150 technology so it is just as fast. Don't be fooled into thinking the seagate is better cause it says "20% improvement bla bla bla". It is just the same as the western digital except it has a very SLIGHTLY faster seek time. 8.5ms compared to 8.9ms.