Got robbed... looking for ideas to make me more secure

Do you have an alarm system? Also dont take this the wrong way but I'd clean out that garage and get your other car parked in it. Glad nobody got hurt. You better buy your neighbor a beer!

Too late now, but if the cams were lower you might have gotten their faces.

Lower the cam, logryhric increase in potential of stuff in garage blocking view.
 
Anyways...

I installed another camera in garage at face level to get better face shots. I also setup alerts that will go crazy on our phones if any movement happens on the driveway/garage/front door.

I also setup my smart garage opener to close automatically.

I have my BI computer in the laundry room right next to the garage door going into the house. I want to get the audio alerts from the computer louder so I can hear it throughout my house. Anyone have any ideas on how I should do that? Are wireless speakers reliable and exist? Could I have 4 wireless speakers in all my main rooms?

I'm also going to mount some cameras next to my street to get license plate/vehicle descriptions. Any recommendations on what to mount the cameras to? Just a 2x4 that I pound into the ground?
Use pressure treated gound contact 2x2, it won't take a mower or car, if so 2x4 the green looking ones. You can use a 4x4 but it's awkward to mount through.
 
I would also start looking at adding more home automation (as you have to some degree with the smart garage opener). As you build it up you'd be amazed at what a good system will do. Smart locks are a great addition for example. And there are systems that will integrate with BI.

edit: oops missed Tome10's reply above saying pretty much the same thing :)