Hey Pixel
Its a Kayak!  Ya I like the Dado Joints,  Theres no magic about building this cabinet,  everybodys using  all these crazy tools and L Brackets.  L Brackets; what the 
hey are they?  

I have found that DADO joints to be very strong and self aligning.  Youll never use an L Bracket again.  To cut them I set my depth to a 1/4in on my router and run it along a fence (3 dollar peice of angle iron) clamped to the board.
I fact the only tool I usually use to build a cabinet is a router and a four foot piece of 2" angle iron.  Although I fire up the table saw for my end panel bevel cuts.  
If you use a circular saw to build your cabinet, your making a mistake.  There are router bits that will accomplish amazing things.