Hi. I would like to get a laptop

Been survey and find information online, these are models i consider:

Asus A43SA-VX011V (i5 2410 + AMD 6730M)
Asus A43SV-VX213V (i5 2410 + NV GT540M)
Toshiba Satellite L745 (i5 2430 + NV GT525M)

At first i want to buy A43SV-VX213V, but NV GT540M has many issues due to Optimus feature.

Between AMD 6730M and NV GT540M, which one is more reliable, stable and less problem? I hope to know which one is more reliable.
(Performance wise definitely AMD 6730M win, based on benchmark result)

Anyone currently using these 3 models or expert can share your opinion.

Thanks.