try having a look at this http://nutcracker123.com/nutcracker/rgb_controllers/
It will give you an informed decision as to which way to go.
Everyone is different in their setups and just like cars, everyone has a favourite
The 101 manual is a good start but now it would help to have more information about your requirements. I understand that this isn't obvious when you're not aware of the range of controllers available.
Are those WS2811 pixels? I can still tell that they're 12V
How many pixels do you want per controller output?
Do you want extra capacity to add more pixels later?
Are there other types of lights within your display?
Do you want a ready-to-use option or DIY to save money?
Are you prepared to use null pixels?
Different controllers suit different displays and there's not really a single best option.
Keep asking questions because it is best to make informed decisions
You may also wish to consider two Pixlite 4 controllers , one for where you have indicated lights in your picture and one for say the other side of your house
This is a smaller version of the Pixlite 16 , but also has one DMX output for dumb lights
There are a number of Falcon controllers as well , but I have no first hand knowledge about them as yet.
Plus several others that could be used.