Couldn't resist - call it the woman in me
What about antique/heirloom? You could find something totally unique (don't just think engagement ring style). You could probably find something affordable and really her style. Do you have any antique or second hand stores around your area?
Just my thoughts - and DO NOT put yourself in debt over an engagement ring. I have seen many people still paying on rings that are no longer together. I do not believe that is your fate
but why add a financial stress to such a happy event!
El