I'd ask her to, rather than upgrade a component, sign you up to receive the 45rpm Blue Note reissue series.
Sure, we audiophiles love our components, but any lasting memories of your wife's love for you would be better imprinted by, and associated with, music.
And it can be enjoyed together.
And you will probably still have those records long after the next round of gear upgrades.
Gear is great, but Music is magical. Like Love.
Happy Anniversary!
Tom