i'v had a g mauler in the past and it is pure fun i can tell you, as for the other type of pure it sure sounds nice but still i prefer the G mauler for quick KO's
I would definitely go with your second option there. Much better stats, a bit more options for your PKing, plus g-maulers are fun as hell. My real life friend owns one and he lets me PK on it from time to time.
Keep in mind they may take away the attack requirement for the polypore staff. While you're waiting, don't train above 50 attack and train your strength as high as possible. If the attack requirement stays the same you can train to 80 if you wish.