finding a decent EEG (Electroencephalography)

I'm looking for an EEG. Not necessarily medical grade, but better than a consumer toy.

Good review:
http://scienceforthemasses.org/2014/04/11/selecting-an-eeg-device/

Build your own

http://openeeg.sourceforge.net/doc/

Consumer toy EEG

https://store.neurosky.com/

"decent" EEG

https://shop.openbci.com/collections/frontpage
https://shop.openbci.com/collections/frontpage/products/ultracortex-mark-iv

https://mfimedical.com/collections/eeg-ltm-psg-systems

https://www.emotiv.com/epoc/

medical grade EEG

http://www.medwow.com/used-eeg-unit-equipment/104.med

https://mfimedical.com/products/cadwell-easy-ii-eeg-psg-system

Not sure about these

https://bio-medical.com/electro-caps.html

https://www.eegsales.com/

rental:

https://www.lifelinesneuro.com