forget the spear. spear is for wimp. look at the war club section http://sdksupplies.netfirms.com/cat_bokuto_singles.html
here. now that's there, methink, a lot of internal stuffs to be had. give me two of those and i'd take on the spear any day of the week, and twice on sunday.
but this thing here is the ultimate weapon for internal stuffs on my weapon rack http://www.amazon.com/Thera-Cane-JMA.../dp/B000PRMCJU
next to my karma, sai, tonfa, nunchuck, lead pipe, cosh, meat cleaver, and last but not least finger nail file and polish (one cannot do proper internal stuffs with bad nails).