well you know it, LRP is my HG brand.
i love love love (lol) LRP Anthelios. comes in spf20,40,50. take the "fluide extrême" version, it's milky, non comedogenic, it glides easily on the skin and absorbed quickly. it also makes a good base under a foundation
the advantage is it really protects you from all the spectrum of both UVA and UVB, and it's made by dermatologists, so the risks of you having an allergy are really limited.
(know there's also posthelios, it's a great after sun.)
anyway, whatever you choose, when it comes to sunscreen, don't hesitate to buy more expensive brands, LRP, Avène, Clarins...