Buy it and have buyer's remorse. As has been suggested, get the 15 year old, if you can find it. I have always found the 23 YO to be too tannic for even my taste......... and you will be hard pressed to find anyone on this site more appreciative of old bourbons than I am.
Do not go gentle into that good night,
Old age should burn and rage at close of day;
Rage, rage against the dying of the light. - Dylan Thomas