Thanks for the nice comments. We also reviewed the 750GB (Both the non-ES and ES versions), but felt it was neccessary to review this drive also. I picked it up because of a new build, and was too impressed to -not- write a review
If you care more about performance, then the 150GB may be the better choice. Personally, I am willing to give up a little performance for the extra space, because I store a lot of music and odds and ends. It's really up to you. If you want better performance, then the Raptor will probably suit you better. I've never actually seen real world differences with the Raptors though, so I always go for the one with more space. These 7200.10 drives are nothing to scoff at... they still give a great bang for the buck.