I had a Millennium Pro .45 and while it went bang every time I just couldn't get used to the heavy trigger pull. It was decently accurate when I learned to stage the trigger. I haven't had any experience with the 24/7 series.
My girlfriend was considering buying a Millenium until she picked it up. The thing was top heavy and not the most comfortable grip. May I suggest a S&W Sigma 9, usually around $350 w/rebate if price is what concerns you.
__________________ Best advice I ever received: It's better to be tried by 12 then carried by 6.