you need to go to your local club(s) and see what idpa, ipsc, other are like and see the differences, etc... and talk to some guys in these sports and don't rush into any decision on dicipline or gun to buy.
see what is the common gun in that sport, as usually the common gun is used for a good reason.
also, when time to buy it, if you can afford to buy without selling any other guns, then that's something to think about, up to you.
and if possible, try to shoot these guns from others who own them and see which feels right in your hands...
a few to consider... calibre and models vary:
CZ
M&P
Tangfolio
STI..pricy
SVI..even more so
other 1911 types