The anthems have a 93mm waist and the invaders have a 83mm waist. The Anthems are better for light powder use vs. the invaders but dont carve as well as the invader. I fins the Anthem is alot more stable at speed.
If you have the money buy a ski that is more idea for your situation. The 177 volko would do you fine still. I ride 171 Line anthems and i am 5 foot 10 inches and 240lbs.
The New anthems are sweet. Just rode mine for the first time today. Love them. As far as boots witch everyone is the most comfartable but the scratches might look cool with the bindings.
THANKS!!! For all your help. IThey are now center mounted and ready to ride for Saturday. As far as powder ridding anything will be better then snowblades in powder.