I recommend this one

i have the 1000W with Auto-IQ. put your stuff in and hit the blend button. 45 seconds later you have a smoothie. if you have frozen ingredients, use the ultra blend button. 1 minute later you have a smoothie.

of the options you posted, i'd consider a few things:

• you posted an 1100W and two 1200W versions, with varying prices. more wattage is better and the two better ones are more expensive, so if that middle one looks good to you, it's probably fine. This is one difference between that cheapest one and the other two (the other differences being lack of a blender bowl and/or the full sized blender container. read on...)
• The most expensive one looks like it comes with better blades and the blender bowl cup and full sized blender, so there's that...but if you're just making a smoothie for yourself, it might be overkill. this one comes with "all" the attachments, so to speak. again, it's also the most expensive.
• the cheapest one has that blender cup functionality and better blades, but lacks the full sized blender. again, if it's just for you and you think you'll be making blender bowls, this would be fine.
  
• if it were me and i'm only blending my morning smoothie that i sip on all morning, i'm getting the cheaper OR the middle one. or this one: Ninja which i have already and it works spectacularly for my daily smoothie. it's 1000W and works great, so going with either of your cheap or middle options is going to be fine...just decide if you need any of those extra cups & spiffy blades.