I'd buy a Saphire 7950 OC, personally I find the quietness of my 5870 Vapor-X worth every penny and I think the same applies to that card.
If you can wait you'll probably save a bit, but probably not loads in the grand scheme of things.
Noise is not an issue i use headphones, always have done.
Oh and i've hidden the cash inside my case so the wife doesn't have any ideas on how to spend it.