It seems like among other things the end use and output would have alot to do with a pick. I like Provia myself, have yet to re-experiment with Astia, but for prints am looking towards trying some Kodak VC to compare to UC. If your shooting 35mm, alot of people seem to like UC which is available thru Walmart in a three pack. If anything, when shooting slide film watch the color temp for neutrals.... I see alot of Velvia stuff since it's obviously very popular for landscapes and flowers, but the speeds are so slow that for anything macro to get dof you have to shoot too slow with wind problems being a nuisance. If prints are small try the 400 speeds.