T4i, 60d, or 7d

Well I have narrowed it down these three cameras.  I would like something that im going to keep for about 10 to 15 years.  I will be taking pictures of my new born son, outdoor wildlife and just random family get togethers.  I would also like something that performs well in low light.  I will be shoot in both RAW and JEG.   I manly shoot in auto.  I need a camera that has really fast shutter speed to sports shots.  Please I really need a camera for my sons baptism next week.  Which one of these three would be the best fit for me? Thanks TJ