I find that most mudguards will struggle with clearance with 25mm tyres, you can try crud or pwd as other options, or even go back down to a 23mm tyres.
They're decent if you can fettle them up properly, but nowhere near as good as a full guard. But much better than nothing if your frame will allow nothing else.
My CAAD 9 with 25c tyres and campag calipers has next to no clearance for a full guard. Are there any other options than sks raceblade style?