i have been using a Proform Treadmill at the gym for a few months now.  It is a very smooth machine, easy to run on.  The displays are very clear and easy to use.  There are all of the standard options available: heart rate, distance, rate, time, incline, ect.. I don't believe that it can be hooked into a TV or MP3 player but it may be that my gym just does not have these options available.  It has a convient shelf for a magazine or book and a water bottle holder. Both are at a good height and easily accesable while using the machine.  It has a safety "emergency" stop button, never had to...