I like these meditation chairs from Zen by Design. They have a variety of models, ranging from a foldable portable unit to full-blown furniture. If you’re going to spend much time meditating, it makes sense to get adequate seating or create a sacred space. I can’t take too long seated in easy pose.
There is also a tantra chair on a separate site, appropriate viewing for adults only. Tantra is a Sanskrit term that means “looms” as in warp and weave of male and female in the universe. It can also mean framework or structure. Tantric yoga emphasizes sensual powers and tries to tap into the magical cosmic forces.