I can get the Dual 2 for $1699 (EDU - $100 "Spring" rebate and a free cheap printer after rebate) or the refurbished Dual 2 at $1649. Now the price difference is even closer. Is the 8 RAM slots on the refurbished worth it, compared to the 4 on the new? The new one also has a better graphics card and video memory. What do you think? I'm ready to bite!!!