Which one of these camcorders should I choose to record my college class lectures ?

Hi, I have been researching which camcorder to buy to record my class lectures. Mainly I want something small, that will pick up what my teacher writes on the board. I don’t want something huge, because I will put this camera on my desk next to my notebook, and i am trying not to standout lol. I also would like it to have a built in stand that can tilt or have an accessory that can let me “tilt” the camera slightly so I can make sure i am getting the right angle of my teacher teaching, because I sit in an auditorium class with no assigned seating. I think I would need a zoom feature, but i’m not sure? I am also planing on using this camera for a long time. My max budget is $400 but ideally I want to spend between $200-$300. So far I have narrowed it down to the following, which one do you think is the better choice? (note: if you have a better option please let me know)

  1. Canon VIXIA HF R500 Digital Camcorder (Black) … http://www.amazon.com/dp/B00HLDFTRS/ref=psdc_172421_t1_B00RKNO06K

2.) Sony HDRAS100V/W Video Camera (White) … http://www.amazon.com/Sony-HDRAS100V-Video-Camera-White/dp/B00HNJWSH4/ref=sr_1_5?s=photo&ie=UTF8&qid=1442716480&sr=1-5&keywords=video+recorder

3.) Canon VIXIA Mini Compact Personal Camcorder (Black) … http://www.amazon.com/Canon-VIXIA-Compact-Personal-Camcorder/dp/B00E62YCQQ/ref=sr_1_9?s=photo&ie=UTF8&qid=1442717601&sr=1-9&keywords=camcorder+built+in+stand

  1. Canon VIXIA mini X … http://www.amazon.com/Canon-9114B002-VIXIA-mini-X/dp/B00HLDFUM2/ref=sr_1_10?s=photo&ie=UTF8&qid=1442717601&sr=1-10&keywords=camcorder+built+in+stand

When it comes to camcorders, I’ve always been a fan of Samsung. Even the cheaper ones usually have Optical Image Stabilisation, reasonably large sensors, and they don’t use AVCHD which can make the files easier to work with.