Also are there other options that I'm missing?
I want to have easy access to the far back corner,

Rob

Just build one cab all the way to the corner and put a door for
aqccess atthe exposed portion. Then look online at woodworkers supply
or even rockler, etc. They have all sorts of nice units now that sort
of slide in and out, etc.

Here is just one example

http://woodworker.com/14-poly-half-m...?search=corner
cabinet&searchmode=2