My only hesitation would be whether I'd tire of the red accents, and whether the F. Piguet movement is special enough for me. Nothing wrong with that movement AT ALL. It's thin, seemingly reliable, and fairly widely used by Blancpain, Vacheron and I believe AP (in non-perpetual form). But....I personally would potentially have an issue with the price as compared to the specialness of the movement. A competitor that you might consider is a pre-owned AP perpetual, which uses the legendary 2120 movement, but of course does not have the chrono complication. These are just my own personal thoughts and sensitivities, so if you're passionate about this piece, go for it as it is a very nice, rare Vacheron (1/20).
Cheers,
John