This is one of the most commonly asked questions. As we often say, it all has to work together in a direct seeding system. Crop safety should be one of your goals.
Cereal crops are much more forgiving than non-cereals.
Maintaining an excellent seed bed should also be of paramount importance. If both are equally important, you will be more limited in your choices of equipment. There are bulletins which will help you to decide whether or not it is safe for your crop. In some circumstances you may be able to accomplish it, but with most of the non-cereal crops, it will be difficult unless your nitrogen requirements are very low, you farm wet clay soils, your row spacing is narrow, or your seed row width is wide. There may be many reasons for choosing either approach, but if you did choose a two-pass system, there may be more choices than you think.