Thanks "old and new" I am in 2 minds really as I want a more comfortable ride as I think this may increase my speed as the roads aren't brilliant around here, however I DO NOT want flats! So far my tyres have been good for over 5000miles combined (Armadillos 23mm and Nimbus 35mm) so I was going to go for a 32mm on a new build but if I have to pump them up to max then I may as well go with a 23/25. Might give it a shot on my 35mm and see what happens!

Thanks for the tips