It might also help to check about the litter habits of the rabbits you are interested in, closer to the time your bunny dates are planned, as their litter habits should gradually improve once the spay/neuter is done. But do keep in mind that though they can come to you with having great litter habits, once you put two rabbits together territorial marking usually escalates. Most often it will die back down after a few weeks, but in some instances it doesn't. There are even times where one rabbit will have great litter habits and the new rabbit that is brought in will essentially be a bad example and they both can end up with bad litter habits. So you really have to consider all possibilities.
Something else to be aware of, with your bunny dates being in two weeks, that may not be enough time for the hormones to die down enough to get a proper idea of whether or not either bun would be a good match for your rabbit. Particularly the male. The female may be fine to try a date at that time, but usually for males it takes at least 3-4 weeks(sometimes longer) minimum for the hormones to have subsided enough not to interfere with meeting another rabbit. Otherwise it will still be all about the hormones and wanting to either mate or fight the other rabbit.