I personally prefer the SACD format as many DVD-As require the tv on to navigate menus (I use a projector). The sound quality is just as good, however, and sometimes the DVD-A will have extra features that are nice. The main determinate for me is the availability of a title. Usually a band will be in one format or the other (ie Porcupine Tree is DVD-A). DVD-A is also often price discounted as the general public doesn't seem to understand the format and gets angry that there is no, or very limited, video.
