Im busy generating content for a site im building and was wondering where the line is between content and spam.

My argument is that im doing a long tail for a couple of hundred keywords on specific topic and there seems to be lots of grey areas where content overlaps .

for instance :

widget in suburb
widget suburb
widget in city
widget city

so how we i go about tackling these problems

My gut feel is to go for "widget in suburb " optimize for widget suburb aswell ?

What has other people feeling on this been ?

Regards

Malcolm