well if the configuration suits your needs, by all means. Depending on how you handle the laptop, no components are not built to last a lifetime, and should something go kaput after the warranty, it's only normal.
Whether it hangs or not, it depends on your usage. if you're not the type who frequently tests new software betas, tinker with the registry and stuff or drop a bowling ball on the lappie, it's unlikely it should hang.