I stick by my original suggestions.
Define "quickly", will the price change in 4.5 months? Yes. In 2 weeks? probably not much.
Also, highly suggest that before you buy anything on Newegg you check out the combo deals, not all of them have it but if they do they will be toward the bottom of the product page.
IE: save $10 on the Win7 64-Bit + MS Office 3-User combo.
*Edit - Also suggest signing up for the e-mail offers and discounts, there have been quite a few good deals recently since its back to school season.
(I should be a Newegg spokesperson)