I really like the Holdsworth.
The Holdsworth Professional (in Holdsworth orange!) is really a grail of mine, but they, and almost any Holdsworth, seem pretty rare here in the states. While your's needs some work, it does have some great parts on it, and that makes it a keeper in my very amateur opinion. With alittle TLC, your's can be a very nice and collectible bike. And since you like the Cadillac ride, I think you have to keep it. The very few I have seen for sale here have been from $1000 - $1500.
Nice to see a Holdsworth on the forum!
It never gets easier, you just go faster. ~ Greg LeMond