I had a P239 (.40S&W)... didn't like it... grip was too small for me... it never felt comfortable in my hand... if you are considering it PLEASE shoot it first!!! If you really like SIG, I do, you might consider the P229... I'm considering it for my next purchase... it has very close to the same grip as the P226.
Glock 23... excellent size gun... I love my Glock 23c... some don't like the "c" model, but I really like it.
Glock's and SIG's are both very excellent guns and have great reliability.