Hi guys I presently use a Canon 1000D DSLR. I am looking to change the camera. Main reason for changing is how often the sensor gets dusty and dirty. First decision I need to make is: normal DSLR or mirrorless? Second, after the first choice is made, which brand in DSLR or mirrorless. My budget is between 30-40K. Within this range, what are the choices? Let the gyaan start pouring.