Regarding the Pinarello FP1, you're not being unrealistic, this is Dan's 3 days 600km "touring" set-up;
He managed pretty well with a compact and 11-25t cassette, I'd recommended a slightly wider ratios to make the most of it (11-28t), combine a proper seatbag rather than a carradice and you'll have a great bike that doesn't feel bogged down and dull as a touring bike.
Regarding the Pinarello FP1, you're not being unrealistic, this is Dan's 3 days 600km "touring" set-up;
He managed pretty well with a compact and 11-25t cassette, I'd recommended a slightly wider ratios to make the most of it (11-28t), combine a proper seatbag rather than a carradice and you'll have a great bike that doesn't feel bogged down and dull as a touring bike.