Buy them now! You deserve them. You worked all you adult life to get things that other thought that they needed or wanted. Now is your turn to have what you want. When you take to $450 and divide it you the remaining days in your life, the cost is nothing.
The only thing that is important is that if you want it, will use in and enjoy it, then by all means you should have it.
I told my girlfriend about your situation and she said "What is he waiting for?"
If you wife disagrees, do not renew your contract with her. Just replace her with a newer model with lower mileage and less maintenance. You need to start enjoying the rest of your life!
Really? Are you Sirius?
I figured you would recommend putting the money towards a Hasselblad.