AbdullahG :
BD will not be supported on AM3 motherboards. I would not recommend getting a BD CPU until software can utilize or at least work with the 8 cores. It's performance barely surpasses a 6 core Thuban. If your motherboard has a TDP of 125W or more, I would recommend a 6 core Thuban or a Deneb core (X4 955 is probably the best buy; you can overclock it to 4GHz on air).
While I agree with the spirit of your post, I hope that it is not misinterpreted. There is software available now that can utilize and work with the 8 cores. The problem is that even in that software, BD is not very impressive. As you noted, its performance barely surpasses a 6 core Thuban. However, it isn't because all of the cores in the Thuban are being utilized and the 8 in BD are not.
Not trying to nitpick and I hope you don't see it that way but I really think it would be bad if people thought that the other 2 cores are sitting idle and that is why it was barely beating Thuban in those situations. They are being used in these multithreaded situations. Its just that per core, BD is not as powerful as Thuban right now at least.
Obviously it is possible that things can be improved in the future with this architecture. However, as it is now, it isn't because there is no software that can take advantage of the 8 cores. The problem is that even in the software that does, BD is still barely beating the X6 (Thuban)
Having said that, I agree that the X6 is a great value at the moment. It is great in multithreaded apps. As far as games go, once you get to normal resolutions that gamers play with eye candy on, the GPU is the bottleneck. So if you are already on AMD hardware, the X6 is a great deal right now. To me the X6 is a good deal.