Asterisk server hardware recommendations

Hey guys,

I’m looking to get a better machine to host the asterisk / centos bundle, obviously one that is unlikely to have much down time. Would any new, therefore reliable, laptop do, or should I be looking at more specialized equipment?

A secondary question - the system I’m planning would only need to be up during work hours. Is it possible to turn the host machine on and off at the end of each day, without causing too much disruption?

Many thanks