This is all very beneficial to hunt trips. However, for OSRS gold casual combat, such as Slayer, the sword's effectiveness is not as great as you think. The sword hits twice more often and harder than the whip, however it's also twice as slow. Although it's not as fast as the Dark Bow's melee variant, it's still quicker than whip. But, without the Black Mask or a super attack potion to compensate for the loss in speed, I would recommend something else. It is all dependent on the size of the monster (Black Demons are an example; Godsword is nice there).
Let's summarize it as follows: You should wait until the Item Lending system is out and then borrow a Godsword for a couple of days from a friend. The hilts are my Bandos hilt, and cheap RuneScape gold I am very happy with it. My personal opinion on the hilts (regardless price) is