I would look at the Samsung Spinpoint F3R 1TB drive. It is the updated / faster version of the original. I'm running the original version and it is a great drive... IMO. It can rival the Western Digital Velicoraptors in performance since it is based on two 500GB platters.
Hmmm , seems like I'm gonna delay buying it for some while , so I had this other question
The HDD I am currently using is "Hitachi HDT725032VLA380 ATA Device" or "Hitachi Deskstar 7K500" not sure which one tbh.
So I was wondering, will I have other (noticable) differences when upgrading it ? (aside from space ofcourse)
I have also been reading some more about HDD speeds and stuff , and I read something about raid 0 ?? people say putting HDDs in raid 0 is much faster or something , is that possible for me too if I would get 2 of these HDDs ?
RAID is best left alone if you do not understand it. It does help if you are moving huge files around but not so much in daily use. Also you have 2 hard drives tied together and if 1 dies you lose everything.