InvisShield is among the best, I did lots of research at one point, & settled on it for N900. Opinions can vary widely depending on tastes, but it's definitely up there, at least for resistive. I'm sure they'll be decent for capacitive too.... It makes sense that the N9 IS is more expensive than the L800 IS in the UK. The L800 is far more readily available, it prolly already has a much larger user base.