dvd burner/blu-ray burner

[fighthefutureofhd]

got a question that i hope can be answered. if this isn't the right forum feel free to move it. anyway, i am in the process of deciding on whether or not to buy a dvd burner or a blu-ray burner here shortly. the main drawback to the blu-ray burner is that they're too expensive. my question is about compatibility. if i were to get a dvd burner i would mostly be burning movie files and such. the formats would mostly be .avi and .wmv files. i have a sony bdp-s300 and i'm wondering if i can burn those type of files onto a dvd that can be played on my bd player as either a dvd or as the files. any help would be appreciated. thanks.