Should I get Thermage, Venus Freeze or Forma for skin tightening in my inner thighs?

I didn't even know this could happen -- the skin on my inner thighs have lost their elasticity so now the fat there droops and it's quite unattractive. I'm 48 years old. I've lost some weight and will lose more but I can tell that skin is going to remain lax. A thigh lift is the surgical option, with skin excision, but I don't think there's all that much skin to remove. I'm considering Thermage, Venus Freeze, or Forma. Are all three of these RF? Which are best for thighs?