Definately check out Clearlight Infrared Sauna. I've had one for years and I don't know how I would live without one. The days I use my sauna, I feel great and my overall health has been good and I this the sauna makes a huge difference.
I found this great article on how to purchase the right infrared sauna heaters. There are so many infrared saunas on the market today that claim their heaters are the best technology. It gets so overwhelming. The article has a list of questions to ask before choosing an infrared sauna. Check it out.