I only use two films in 8x10 size, Classic 400 being one of them (Efke PL100 the other). The extra speed makes for a great partner with Efke, my primary choice. I have also just discovered that it has very pleasant reciprocity characteristics. I have tried Classic 200 and I personally would not bother with it - you get absolutely nothing advantageous except a measly extra stop in speed, if that. Efke is so superior in every department to Classic 200 that I have cast that film aside in favour of Classic 400.