40cal, welcome to THR.
One of many reasons why some people did not like the Taurus pistols was their Double Action Only (DAO) trigger that did not allow you to shoot fast follow-up shots. I test fired a few models a few years back and I could not perform a fast double tap required for match shooting (USPSA/IDPA).
A few years back, the Millennium Pro line came with DA/SA 5 lb Single Action/multi-strike trigger (No italic
"Pro" next to "Millennium" on the slide) and it is like day and night. I have the Mil Pro PT145 in stainless and while the SA trigger pull is not clean like my Glock, it is good enough for me and I really like it.
Before you make the purchase, I recommend you try shooting one at the range (most ranges will have the Mil Pro models as range guns). Of course, Glock/XD/M&P will have better trigger and perhaps more suitable for match shooting, but I would prefer the Mil Pro trigger for fast double taps over Sigma/P95 triggers (based on my own comparison tests). Also, compare the trigger to others like Glock and see how you like them. Personally, if you are serious about match shooting, I would recommend a Glock, but that's me (My match gun is a Glock 22).
As to accuracy, my range trip today produced 1"-1.5" shot groups at 7-10-15 yards with my match reference load of 200 gr SWC 45 ACP with W231.
However, as many may post, Taurus customer service is very slow and not very desirable. I had to return my factory magazine due to manufacturing defects and it took 5 months for me to receive the replacement magazine.
Since you are interested in the 40 S&W Mil Pro PT140, you shouldn't have much problem finding magazines, holsters and accessories. Believe it or not, my PT 145 slide is shorter than my Glock 27. PT140 is a bit shorter than PT145. Both have great ergonomics (slide lock, mag release, grip angle similar to Sig) and come with Heine 8 sights/10 round metal magazines.
http://www.taurususa.com/gun-selector-results.cfm?name=Millennium Pro Pistols&page=2