When BD was released there were issues with the process used to make them(done by a company called Global Foundries) which meant the BD CPUs consumed more power than they should have,and had lower clockspeeds.
However,since it has been a few months since launch,the problems seem to be getting better. This means for a given clockspeed,the TDP and power consumption have dropped or either at the same TDP and power consumption clockspeeds should increase.
Look at this post:
http://forums.hexus.net/2318201-post6.html
The FX8120 was mostly 125W TDP models with a few 95W ones. Now ALL FX8120 CPUs in the next few months will be 95W with the 95W FX8140 is being released soon. Hopefully given a few months more,the 125W FX8150 should be released by a higher clocked model at the same TDP and same price.
If you cannot wait,the pre-overclocked 125W FX8120 deal on OcUK is not too bad due to the cashback and free game. The cashback is £20 and the game is worth at least £10.