I am looking at upgrading from my Canon Xti. I want to do pet portraits and family/baby portraits as a serious hobby. I am looking at getting a 5D mark II, 24-70mm f/2.8L, and 70-200mm f/4L. Is this overkill and should I go with the 50D/7D? I want a camera I will be happy with for the longest amount of time and I am not sure if the 50D or 7D will be enough. Thanks in advance for the great advice as always!