One of the best Security Systems you can buy on Amazon is certainly the Arlo pro http://amzn.to/2vFnVsn from Netgear.
It is Amazon best seller and top rated. Here is a review https://www.pcmag.com/review/351867/netgear-arlo-pro
Also good are
- the cameras from Vimtag http://amzn.to/2gl1zKG
- the Nest Cam Indoor http://amzn.to/2wFAOY4
- the cameras from Amcrest http://amzn.to/2wOu8ar
For a wider choice of smart home security products you can check this article on safety.com
Not many systems have a monitor included, but many solutions have the possibility to connect any smartphone or tablet, so basically you can use your own tablet as a monitor, or purchase a cheap one to do the job.
The Arlo pro even allows to connect with Alexa and work with voice commands.