I wouldn't get a new bike - you have a classic right there. A good clean would lose some weight
, some new bar tape to spruce it up, there are plenty of 1" threadless forks on eBay - some full carbon, some with Al steerers, you could get some blingier wheels for $350-400. Is that an American Classic seat post? If so, it's light but stiff IMO. I had one and swapped it for an identical AC titanium post - the first ride, I thought my rear tire was soft. I imagine any CF post will be more forgiving. Pay some attention to aesthetics and that would be a good-looking and unusual (nowadays) classic ride