I'm planning on practicing muay thai and boxing and I'm wondering if it would be better to get the 100 lb or 70 lb version. I'm male, about 5'6", and 135 lbs. I've heard differing opinions on how heavy of a bag is good for muay thai. In this link, Product Spotlight: Everlast Nevatear Heavy Bag | Dan's Muay Thai MMA, the reviewer seemed to have no problem practicing muay thai on a 70 lb bag, however, a random user at another site said "You can certainly kick a 70 lb bag, but it's going to be swinging an awful lot. If you're torqueing your hip into your kicks (and you shoud be), 100 lbs is the LIGHTEST I'd go. I've used 150 lbs for Muay Thai." What do you all think?