outlet in cabinet
 

I bought some under-cabinet halogen lights that plug-in with a standard
2-prong plug. The lights' outlet will be controlled by a switch.

I'm considering two options.

1) I can install an outlet behind the cabinet such that the front of
the outlet box is flush with the cabinet's back.
2) I can install the outlet within the cabinet (using a metal box
because it will be exposed).

Suggestions?

Thanks again,
*moc