Under $600

1. Nikon D3300
2. Nikon D5300
3. Canon Rebel T5i / EOS 700D.
4. Canon EOS Rebel T6 / EOS 1300D.
5. Sony A68.
6. Sony A6000. 
7. Olympus OM-D E-M10 II.
8. Panasonic Lumix LX100.
9. Sony Cyber-shot RX100 II
10. Panasonic Lumix TZ100 / ZS100