I have decided to get the Mono Speedy 25, no doubt about it. I am planning to use it as an everyday bag (perfect for work and for the weekends as well). But I have actually fallen in love with the Speedy 40 too. I am going on a holiday in August and I thought the 40 would be the perfect carry on bag and I would use the speedy 25 too as my handbag? Do you girls think? That way the two bags are not too similar in size and if I ever feel like using a big bag for the day, I could still use the speedy 40? Your opinion please?