Higher gear inches = bigger chainring/ smaller cog
Lower gear inches = smaller chainring/ bigger cog
Always inverse relationship between chainring and cog.

I run 46-16 and I think that's pretty good for mashing, especially on those hills, but if you're riding flats you can probably go higher.
I say 48-16, because adding two teeth to the chainring makes less impact than taking away two teeth from the cog. 46-14 would be pretty intense.