Hi Joshi. I agree - this may be your best post yet.

A nice pose with good sharpness around the head and front leg. I like the reflectiveness of the leaf. Roman has given you a couple good suggestions for tweaks that will make your image even stronger.
You might want to post your question about a DSLR on the Photography Gear forum. Be sure to specify whether your budget is just for the camera body or for the body + lens as that will make a difference. You might get a debate between Canon and Nikon users - but both are good systems. You might also consider a used DSLR body. For example, the Canon 40D is a very capable body that you could likely find used at a reasonable price - which would leave you with more money for a quality macro lens. Just some thoughts to consider.