Can you afford it? Sure. By the usual guidelines of spending ~2 months paycheck on the engagement ring. I wouldn't do it though.
Okay, I am going to go heavily against the prevalent culture here even though I might end up getting flamed for it.
Please consider that this marriage tax was not present (or atleast was much lower) prior to the De Beers marketing campaign managed to make it part of our culture.
It's a shiny rock. It sits on a finger and does nothing more. Do you need that rock to symbolize your love for her? Does that rock have to be more than 1 carat? Does that rock have to be a natural diamond or can it be manufactured? Can it be any precious stone? Can it be any shiny stone?
At your current income it looks like you'll end up working for 2 months (after tax) to pay for this ring. 2 months you will never get back. Have you considered all the alternatives? How about you spent that $8000 more on your honeymoon with your wife? Put that $8K towards a new car? Give $8K to an orphanage or some other cause you care about? Save the $8K and boost your retirement accounts by almost 10%? Invest the $8K and at a 7% return, it is going to be $65K when you retire @ 65. I am sure she will enjoy looking at the ring every now and then, and I am sure a lot of women will compliment it every now and then. Is that worth $65K when you retire to the two of you?
Yes I am happily married. Yes I spent a small fraction of the amount you are looking to spend. It was a diamond ring but it wasn't flawless, 1 ct, extra super special cut with brilliant fire dazzling powers.
Anyway, You asked for advice, I gave you mine. If it makes you and her happy, ignore me and go for it. Every person is different with different goals and priorities. As long as they are happy.
Either way, Really happy for you guys, Best of luck! Hope she says yes.
