Well you can take a look at the Portege T130 or M900 for 13 inchers as shown below (quoted from Mr. Miahahaha):

Toshiba M900, i3 330M + Nvidia 310M@RM3199
Toshiba T130, SU7300 + GMA 4500MHD@RM3099 *no DVD
Toshiba Portégé T130-D337, SU7300 + GMA 4500MHD@RM2899 + Toshiba SuperMulti External Drive
Toshiba Portégé T130-D332W, SU9400 + GMA 4500MHD@RM3099 + Toshiba SuperMulti External Drive + 2nd Year Local Warranty
Toshiba Portégé M900-D351, i5 520M + Nvidia G310M@RM4099 + 2nd and 3rd Year Local Warranty
Toshiba Portégé M900-D338, i5 520M + Nvidia G310M@RM3699

The T130 is lighter but it runs on CULV processors which is mainly for battery life one, the processor is comparatively (significantly) weaker than the M900.
The M900 comes with optical drive, a decent processor as well as an GC.... so its kind of heavy haha XD

If you are not very rush in buying can wait for the new Portege series (T210 or something, forgot the name le) that runs on Pentium U5400