Is it alright if I suggest an engagement ring with a $2300 price tag?
Why would you buy such an expensive ring?
My girlfriend wants a ring that costs a pretty penny.
It's selfish of her to demand a cost minimum for gifts. It implies that she is superficial and it also wastes the money of the people she cares about.
She said she really wants a ring that would make her feel special.
The fact that it's an engagement ring from you should be enough to make it special for her. The cost should have no bearing on it since it's the meaning behind the ring that makes it special. I don't think you should feel pressured to spend so much on an engagement ring if you don't want to.