I have 2 of the original x25s that you linked. I have them striped and use them as my OS drive as well as for WoW. Have had absolutely no problems at all with the setup, great load times on WoW, texture loads are good. Still struggle running 5 toons around Dal however (generally 15-25fps) but I don't think the drive is the problem here.

Anyway, I would stronly recommend them over any other SSD other than the new Intel ones when they become available, although I am not sure you will see a huge difference anyway.

Cheers