Now I can't remember where I read it, but some tech support worker told a user that they needed 4 gigs of ram(from 2 gigs) to speed up their Internet connection.
Imagine how fast your connection could be with 128 Gigs of ram...

But with more memory to avoid the page file, I suppose. My minimum for the new machine will be 2 gigs.
Adding more ram doesn't make your internet connection any faster unless you have a ungodly small amount of ram.
The ethernet controller is slower then what the ram can read and write at.
The only thing that would be faster with a 128GB of ram outside of government sized databases would be working with massive photoshop files even then your pushing the insanely wasted side of things with 128GB of ram.
Maybe in 10 years something will actually take advantage of it.
If you plan on going with an Intel i7 core, you'll need 3 gigs, as it uses triple channel memory....
If your going core i7 you might as well spring for 6GB of ram because if you really want to use the processor you want a lot of ram.