I would like to get a camera for taking close-ups of my coral and fish. I do not know anything about cameras. I have a Olympus stylus tough right now and it takes crappy close-ups. I have been reading and I know I want a DSLR, just dont know what one. I dont need the best just something that I can get some good clear close-ups. Whats a good starter and how much do I need to spend?