source for reasonably priced end mills

I am waiting for my C-Beam to show up and am trying to source some end mills (1/4" and 1/8") but am having issues finding any for a reasonable price.

My secondary question is since I will be running 6061 I know the coating should be ZrN but is that 'required' or 'recommended'. I know NOT to use the wrong coating for what I am cutting but am not sure about no coating.

Any assistance is appreciated!