There are many different options for a modern storage for the Apple II and it is always hard to make an informed decision about what is the best option that fits your budget.
Old Tech | New Tech Magazine has published the first of a series of articles planned about the solid state options for the Apple II. The article reports a benchmark comparing CFFA2, CFFA3000 and Floppy Emu, all using SmartPort emulation (as opposed of Floppy Drive emulation). Smartport was usually used to connect hard drives.
Link: OTNT Magazine