shelve configuration selection

I am not good at making decision. It does not mean I cannot make the best choice but always think of the good side of the second options.

Shelving system has the advantage of adjustable, expandable and can be put your new apartment as you move. But just because my small living space and "this" shelve is so valuable, I have to pick the configuration with special care: best looking, best storage capacity and best price.... should be most affordable price. 

Option 1  

This should be the most typical configuration, all enclosed storage space are at the bottom.  

Option 2

This configuration is more attractive as a shelving system should do. And it free up the storage space under the table to keep the stool and other stuffs. But this also may block the air flow from the air conditioner above, I am worry this may do harm to the cabinet.