This is the right place to discuss on how to implement hardware vsync, adding a VIA or AY chipset, puting multiple roms, or how to design a new flash expansion card.
Well, the floppy drives are kind of hard to find, it's mostly a question of change (there's been a number of people selling setups in the few last months, but that's the exception, generally it's less common). These days all the hopes are on things like Cumulus.