the black finish is very easily marred by most anything that rubs it not to mention routine use/sharpening, just like black coating on all knives. unless ya go skindiving or something (that needs a lot of corrosion resistance and ya dont ever oil it) i would stay away from all coatings, myself,
unless there is some specific reason ya need serrations (ie ya cut lots of rope....) i would stay away from them myself, imho they dont look as good as plain edge, the re-sale value and desiribility of the knife is higher w/a plain edge, the serrations arent easy to sharpen, personally i dont like combo edge knives, some knives like a spyderco police i think look better serrated, nothing looks better part serrated imho.
if i was looking for another '7 i would get a std tanto blade one, or the super, not the spearpoint, i just dont like any spear point EKI's, myself.
have ya ever seen a SOCFK, the are a specwar handle w/a '7 blade and they are waved, $140 at extreme outfitters, a lot better knife imho than a '7, but '7s are ok too. but if ya have never seen 1 ya should check it out, the SOCFK is my fav non custom emerson. CQC8's are cool also, very close to the custom really.
good luck ,