If you are looking for gaming performance then the MS-1029 is the better of the 2, the Acer TM4402 only has 64mb of Video Ram and only a 1.6Ghz Turion.
Both of those have pretty crappy displays (WXGA, 1280x800)
The Acer should get...
Yes this is one reason why I am waiting for the x1600, not just because it is faster than the x700, but because 256mb will probbaly be the minimum, or atleast more will be released with 256mb..
Vista recommends 256mb of video memory...
There is nothing that can be done without diagnosing it, do traces and speed tests..
Try running a Line Quality test from http://www.broadbandreports.com/tools (packet loss test) as well as some speed tests.
You can do a trace route...