OK so I am looking for a HDD upgrade and need some advice. I have the following 3 choices: 1. Stay with my stock 250GB 5400RPM for a couple months and get a 250GB SSD (probably the Samsung). 2. 320GB 7500RPM WD. 3. 500GB 5400RPM WD. I don't really know if the difference in RPM in 2 and 3 will be too noticeable, but if it is, I wouldn't need the extra space. Only reason I would go for the SSD is because I spend a damn lot of time in a car and even on small bumps the HDD tends to stop for a second or two, and it's VERY annoying during movies. Also, the speed difference seems very nice in the SSD, because my current 256GB is getting SLOOOOOOOOW. Thanks for any advice.