First, I think this thread is so incredibly sweet.
If she doesn't like yellow gold, I wouldn't even consider it. My now-DH bought me a yellow gold engagement ring (and wedding band). I tried desperately to love it, but the yellow always bugged me (sad to say, but true). However, I loved that it was from him. So, in that sense, it isn't the ring that is as important.
Mine was a 1/2 carat princess cut. He was fresh out of college and I was a senior in college. And he got a GREAT deal from a local jeweler. He would've easily paid hundreds more if he'd bought it through a chain store. And, it was great quality for the price!
Now, we have been married for 12 years. For our 10th anniversary, he bought me a ring that is more what we both would've loved if we could've afforded it at the time. It is a gorgeous sapphire and diamond Christopher Designs ring. I get compliments on it all the time.
I am planning to reset my original diamond into a pendant.
That all to say, local jewelers can sometimes give you great deals on better diamonds than you'd get at a chain store. And often, they sell you the diamond, then set it into a simple band (what DH did). I had the option of getting a different band with my diamond, but I didn't. I kept the one DH had picked because he had picked it. Of course, you can choose a pricier band if that's what you want. But, you might want to consider looking for a loose diamond first.
Good luck to you! Trust me, if she loves you and she is truly the one, the ring is just a symbol. What's more important is the two of you and your relationship.
