I'm planning on upgrading my OS to Windows 7 and at the same time getting an SSD to help speed things up. I've gotten an offer to buy a slightly used intel x25-M G2 160Gb for 180€ from a friend. For roughly the same amount of money, my other options include:
You may want to consider the Crucial M4. It is a popular ssd and relatively trouble free.
Solid state drives with SandForce controllers have experienced more than their fair share of problems. This is particularly true of OCZ. Recently over a period of 6 months OCZ had to issue 5 firmware updates.