Don't make it something fake when you do it. Do what is natural for you two. If you aren't over the top, who cares as long as you are both happy with it.
Confession...I've actually been looking at rings too, unlike every other girl out there its just not something I ever started doing when I turned 13. I find I just am not the run of the mill "princess cut 1 carat" type of girl that a lot of the girls I know seem to all have, its just boring. I want something that is me. Keep your eye on Craigslist for unique rings or for estate sales. You can find some really nicely priced different jewelry, the antique stuff just has more character to me.
So, so you think you can tell Heaven from Hell,
blue skies from pain.
Can you tell a green field from a cold steel rail?
A smile from a veil?
Do you think you can tell?
And did they get you to trade your heroes for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
And did you exchange a walk on part in the war for a lead role in a cage?