I agree with Mike above- sounds like a nice deal if the bike is in good shape.
The Breva 750 is a completely different bike- my wife owns one. The 750 is a nice, pleasant, well mannered, easy-going, predictable, little bit underpowered bike. It is just lovely to drive- especially nice around town or slow trips.
The V11 sport is a pig in town, but shines out on the twisties. What kind of riding are you wanting to do? Commuting? The Breva would be the "sensible" choice, but I'd go with the Sport every time because it suits me.