I'm looking to purchase a heavy bag to be used outdoors. Due to space issues, I probably cannot fit a hanging bag. So, I'll need to get a free standing heavy bag. Does anyone have experience with any particular bags? I am 6'0, around 190 lbs. I'm worried about the height of a free standing bag, and the fact that when you kick such bags, they tend to move. Any suggestions or tips are welcome! Thanks.