If you can work comfortably with windows it's a pretty sensible choice, from an economical stand point.
Also have in mind that the high end iMacs, in general, were always more expensive than bare hardware PCs and nowadays Apple is going the opposite route by raising up the prices (nMP, iMacs etc).
I'm a Senior Windows & Linux sysadmin so I work daily with all 3 platforms. I love OSX simplicity and the app ecosystem but I'm just tired of the premium price and the restrictions they impose. I prefer to have some control over what I pay and I know what I'm getting into. I already have a powerful Pc, in fact I have higher GeekBench score than the current i7 6700 in the current maximum iMac build. Next step is getting an ultrawide 34" wide monitor. I won't sell my rMBP, it will serve me a few years. I love reading on the retina screen.