Sabayon should work on this laptop.
linux works fine on atom n270,
video and audio is standardhttp://www.notebookcheck.net/Review-Tos ... 902.0.html
And is powerful ,
I did Install linux on Samusng n150, was't that powerfull (slow multitasking) but faster then windows starter.
Try Sabayon with Gnome, more easy.
Gnome should be lighter than KDE, but the main factor is GPU driver setting.