Recumbomatic and BlazingPedals listed most of top brands and Performer is also a good entry model. I know some folks who also like TW Bent, an inexpensive Taiwan brand. My first trike was actually a TW-Bent Trident model (unrelated to the Trident brand) I bought from a friend. I'll put a vote in for Catrike as a good midrange price brand with great engineering and a variety of options including folding and suspension. I have a Catrike Expedition I bought used several years ago (replacing the TW-Bent) and have loved riding. No suspension or folding, just a really solid trike.