I was thinking of getting a new HD since my 250 GB 7200 RPM is getting old. I wanted to go for SSD, but I just can't afford pure SSD as it doesn't have enough space for the price. I was looking at the hybrid of them both, and a vid showed that it is only a few seconds slower than SSD.
Unfortunately this is the worst time to buy storage drives because of the price hike caused by the flooding!
Could you elaborate how you use your PC? I.e. Do you need this extra capacity for games or is it simply because you have more media.
If it's the latter then what I'd do is separate the concerns and opt for having two drives. One with the OS and the secondary for the media content. So that's pretty easy for you do right now. Just pick up another drive and move the content you want across to the secondary drive. No OS reinstall required.
Capacity sounds like your primary concern right now over speed?