billy, you want the best for the lowest cost.
The pro's here do the same years of testing and research.
I myself have tested lots of gear i wouldnt use in production but tests well
I have to say if pure diy stay away from the better pro gear because it isnt easy to get right
if its recent it will have toughend glass but
its plastic so ill avoid the glass issue i see
then it has a cylinder
or even a bump
have a decent alarm basically