I have been kicking around the idea of getting a punching bag for quite some time now. does anyone here know anything about them? I'd like to get a decent "hanging" bag but i cant put it up in my garage because of space constraints and my basement is finished. I would probably just put it in the corner of my office on a stand, but those stands are pretty spendy and seem like they take a bit of room. are those water filled floor punching bags any good? cause i think they are cheaper and might be easier to deal with in my house. do they leak? do they fall over a lot? would i just be better off with a normal bag and a stand?