9.3 USB vs SSD vs SATA DOM?

As I have gleaned from reading several posts in this section, 9.3 has several new features that will require larger and faster boot drives.

Would anyone like to weigh in on the advantages/disadvantages of sticking with a 4GB+ USB in a standard home setup and then the advantages/disadvantages of switching to a SSD vs SATA DOM, please.

Edit: Should my next upgrade for my SUPERMICRO X10SLM-F-O be a SUPERMICRO SSD-DM016-PHI SATA DOM 16GB, Read: 285 MB/s, Write: 75 MB/s?