Sinik, I say get the Samsung 830. The OCZ drives are fast but they're not that reliable. Intel's Ssds are really reliable but you sacrifice speed. The Samsung 830 seems to be a good mix. I have a Samsung made SSD now and it's been reliable.
What he said!
Very fast: Vertex III (or Sandforce 2 drives)
Very Reliable: Intel
Fast and Reliable: Samsung or Crucial m4
As a personal choice, I rather opt for reliability above all, unless drive's speed is pathetic. I am too lazy to fiddle with OS re-installation, RMA and whatnot so I opted for Intel SSDs and m4. Also, torture tests from xtremesystems.org show that Intel drives can take a very solid beating so that and Intel's 5 year warranty on 320 drives is what I wanted.
For speed, I don't really care, the difference between HD and SSD is gigantic, but I can't tell the difference between my Intel 320 and Crucial m4.