I'm a fan of single action. I'd probably go with either a Sig Sauer 229/226 w/ hammer, another option would be one of the 1911's out there chambered in 40.
Of the DAO models, I think the Sig DAK, Glock, and S&W MP offer the best triggers.
I also got a chance to shoot the new S&W-M&P model. I'm not a big S&W fan, but I really like this gun! Very accurate and you can customize it to fit your hand. I think S&W hit a home run with this gun and might give Glock some competition.
I own one and I love it. Accurate, reliable and easy to disassemble for cleaning. It is so smooth to shoot. Fits me so much better than the Glock.-