^^^^^^ this. You mentioned you are interested in IDPA. Next step is to decide which division.. CCP, SSP, ESP, CDP, or Revolver. For CCP, SSP, and ESP 9mm is the best bet. CDP requires a 45. Striker fired guns can be used in any of the semiauto divisions depending on size. 1911s can be used in CCP, ESP, and CDP (again depending on size).
Best bet is to shoot your XDM in a few matches and look around at the different divisions and decide which division strikes your fancy. Talk to the better shooters about what is the best gamer gun for your chosen division.
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