I just bought the Blackhawk! CQC Serpa holster...it comes with both the paddle and the belt loop adapter which I liked for versatility...plus it's carbon fiber, which is supposed to be more durable than the polymer Sporster model. I bought the left handed model...
Blackhawk 410525BKL CQC SERPA Matte Finish Holster Left Hand S&W M&P Sigma 9/40
http://*******/WeoX8k
the right hand model simply swaps the "L" at the end of the part number for an "R." it is also known as model # 25.
BLACKHAWK 410525BK-R CQC SERPA RH MT fit S&W M&P SIGMA
http://*******/WQbyUg
it fits my SD40 VE beautifully and the release is great! very easy and efficient to holster and re-holster...money well spent in my opinion! love my holster!