http://www.notebookforums.com/thread230162.html
If you look here under M1710 the second group of cards are recommended. I'm somewhat embarrassed how sloppy that thread still is but it is what it is.
The M6400 has already been on Outlet for months. Systems typically get added to Outlet a couple months after they launch. Considering that the M6300 is still on Outlet and the M90 was still on Outlet until about 6 months ago, you have...
I don't have time to check on this now but I think the thread I was talking about is this one: http://www.notebookforums.com/thread206665.html .
The user is savat