Hi... Have been doing some DIY home automation research too...
I'm busy designing and planning a house that I plan to have completed by this time next year (so researching at a comfortable pace and keeping an eye on interesting products that will be 2nd or 3rd Gen by the time I have to install).
I am someone that aims for ease of use and don't like to see cables anywhere.
The key products that I have found are listed below. Some are crowdfunded startup products that have or are about to hit market.
I have just purchased an
Amazon Echo which I intend to use as the base for voice control and bind everything together.
Amazon Echo:
https://youtu.be/FQn6aFQwBQU
Amazon Echo:
https://youtu.be/KkOCeAtKHIc
Amazon Echo:
https://youtu.be/G7fARJxXCnc
I can confirm that it seems to have no issue with our South African accents and yes, the speech engine is as good as it sounds on the video clips. Almost scary good.
I am planning to use mainly the Wink Hub and SmartThings Hubs as mentioned above so most of my research has been around products that do or plan to support these "ecosystems".
Wink Connected Hub:
https://youtu.be/DrB9Q9QnsQw
SmartThings:
https://youtu.be/wR6t2M7vXoM
For a smart doorbell, I'm leaning towards the
Ring Smart Doorbell.
https://youtu.be/vl8sZI5AH4g
For the front door lock, I'm leaning towards
August Smart Lock. The video doesn't show it, but there is now also a small unit that plugs into the wall (within bluetooth range) that makes it wifi and connected to your network and able to open it from anywhere in the world.
https://youtu.be/cf9DRZLEVTM
For lighting, I think nothing beats
Philips Hue. With the Echo voice control you can switch on/off and dim to whatever percentage you want, but not change colours yet. You can group the lights in all sorts of various groups for voice control. Sadly, these lightbulbs are not cheap, but claim to last for 15 to 20 years. Note: There is a GU10 model bulb that is the size and fits in our conventional 240v downlighters fittings.
https://youtu.be/W1OleHgVR6k
Then some honourable mentions and potentials for me (be sure to check out their videos):
http://senic.com/
https://flic.io/
http://www.kwikset.com/kevo/default.aspx#.Vctc4PmqpBe
https://lockitron.com/
https://danalock.com/
https://www.havenlock.com/
https://minut.com/index.html
http://getnotion.com/
https://neeo.com/
http://luceralabs.com/
https://cocoon.life/
http://www.wallyhome.com/
https://youtu.be/0OfEhApLIPI
https://youtu.be/41fG53zMbPA
Finally, most of the items researched do or plan to with with IFTTT (
www.ifttt.com).
Obviously the biggest enemy here is the exchange rate, etc. but between all the stuff listed above, one can kit up a house nicely for much less than R100k.
Let me know what you think and if you have any advice.