I remove the stem, slice in half length wise and mostly leave the seeds in; although I did remove the seeds from my large Red Habs and was rewarded with a rich deep red chili powder.
If you do change you mind and decide to purchase a dehydrator I recommend
this one as the best bang for your buck.
Remember, you can dry all sorts of things with a dehydrator and it will probably be used more and more as you experiment with it. Jerky is what mine is used for most and if you eat a lot of jerky the dehydrator will pay for itself in no time.