I'm looking for a self defense weapon to keep at home (that is not a gun or pepper spray). I will not carry it on me outside of home so size and weight is not an issue. Cold Steel makes Katanas (short 13" swords) but they're pretty expensive at around $200. Their long swords look appealing but I won't kid myself into thinking I can handle a 30+" blade effectively. I'd rather this self defense weapon I'm looking for be a long blade versus impact weapon (baton, louisville slugger, etc.) unless you can convince me otherwise. I don't mind spending the $200 or so for a 13" Cold Steel Katana if it really is worth it over something like a $50 10" Ontario sp10. What would you choose?