/cgl/ - Cosplay & EGL

Any advice on getting a good Usagi wig? I'm going to a con in two weeks and my friend (her first con) wants all of us to dress up. Not full-cosplay, but 'characters in casual-wear' sort of thing. I've been looking around and I'm seeing wigs where the buns are detachable and I'm seeing ones that are all sorts of different color blonde. Should I get a 'pre-styled' wig? Or would I be better off getting a really long blonde wig and styling it myself? Any help is extremely appreciated!