4th Gen vs. 5th Gen Help

I am in the market to purchase a new laptop to replace my 3 year old Asus G53SW. I have been browsing xoticpc.com and have pretty much narrowed it down to a 17.3" Sager. However, I am torn between ordering one now with the 4th Gen i7 or waiting a few weeks and getting a 5th Gen i5/i7. This is what the laptop would be used for:

Gaming such as Rift and WoW (nothing too CPU or GPU intensive )
Netflix streaming
MS Office

I am NOT concerned about the following things:

Screen size as I HDMI to...

4th Gen vs. 5th Gen Help