i am new here but have been doing some reading, which has been helpful, but i dont think my exact question has been answered anywhere.

i myself am not new to riding single speeds or fixies or bikes for that matter. But my sister on the other hand is. For christmas i am going to get a her a fixed/ss and havent quite found the right one. my budget is about 300 and heres what ive looked at so far

windsor clockwork
windsor hour
motobecane track
and giants ss/fixed

i am really stumped. i know it needs brakes but if it doesnt come with some i can add some pretty easily. i want it to have a nice ish tough light wheelset (as nice as you can get on a factory complete). what do you guys think she needs it in the 48 50cm ish size