I second this
"Buy the one that looks best with clothes hung off it - coz that's what it`ll be used for in a couple of weeks"
IF you do end up using it regularly you will be one of a many few who own home fittness equipment and acctually use it. My other half spoke about how it would be easier for her to do a bit of post work exersise if we had a cycling machine. We borrowed one from her sister (which doesnt get used) and shock horror it got used twice.
Download some of the current fitness trends insanity/px90. you wont use them any more than you would have the running machine but they will take up far less space.