ive heard theyre amazing in low light. great camera for the price
my only concern is the ability to grow with it. maybe i dont know enough about pentax but canon or nikon seem to be able to offer a wider range of lense upgrades and gear to accompany the body
ive heard nothing but great things about the canon t2i. im still workin with the rebel xti and after probably 50,000 shutters im still going strong so that gives me confidence in the quality of canon entry level cameras