Vista had a maximum of 5.9 score for any device. Windows 7 extended the range to 7.9 to account for new technologies such as SSDs. You're basically not going to get beyond a 5.9 score for any single hard drive. You might be able to get a couple of decimal points more using RAID arrays, but to get anything significantly better you'll need an SSD. This is a reasonably accurate reflection of the huge difference in access times between hard drives and SSDs.
I certainly have no complaints about my Intel X-25M G2 drive...
One of the big reasons I chose Intel was because I felt it might be a more solid product than some of the other manufacturers. That seems to have been validated by this article. In fact according to that article it seems that SSDs in general are no less reliable than a typical hard drive.
I have a Vertex 2 240 GB & Intel X25-M G2 80 GB and I love them both & have had no issues (even with the 25 nm version of the Vertex 2). At the same time, I NEVER put faith in the WEI as any type of true bemchmark. I would look at benchmarks provide by Futermark for a better idea. (PCMark Vantage & 3DMark 11).