grunt soldier
Master
i guess it all depends on which busse your using. all of mine hold a very very nice edge and thats even after being beaten on. but if your going to be doing delicate work you would definitely be much better off not using the killa zilla or nmfbm but i think that would be pretty obvious to anyone. if your doing that get a boss or bad or sar3 or any of the smaller ones. but infi holds its edge very well