+1 on the M&PI have no experience with the sig but I have a FN-40 and it's a great pistol. I like the adjustable back straps and the balance of the pistol. Holding 14+1 40 S&W rounds is also sweet and it's still slim and light. I've owned my FN-40 for almost two years and have put a few thousand rounds through it with out a misfire or a jam. It is almost too easy to field strip and the mags are stainless steel. I like my S&W M&P better but the FNH runs a close second
There isn't much that I have found wrong with the new PT1911's from Taurus. A great gun for the money. Don't believe the Taurus haters...I'm actually also thinking about getting the Taurus PT1911, but I read some bad reviews about it being poorly built or something, a 1911 would be awesome (I'd love to get a 1911 in 9mm)