Advice on extending wireless range / router recommendation

[lafinfil]

Thanks for the suggestion Matt

I thought of the Buffalo but I want to get something local B&M for convenience.

I'm not paying for it (she is) so a few dollars more not an issue and making it convenient for me is.
: -)

If I get something at the local big box I can always return it if it doesn't work. but I want to go in with a realistic expectation.