I've never been a big fan of Bailisk II, SheepShaver is indeed much more forgiving and much easier to set up. Then again B-II runs much earlier systems, so I guess it all depends on how married one is to color System 7. I kind of glossed over the System 7 days and all the extension conflicts and embraced System 8 anyway ... so my interest is somewhat tainted.
As for Mini vMac ... I've never understood the need for networking in an old environment anyway, though I have occasionally used SheepShaver to pull files directly off an older Mac and download directly into the emulator from the web, which reduced the import process. With HFS write disabled in Snow Leopard and likely to got away completely in 10.7, its importance increases for getting files in an out. Will Basilisk II use AppleTalk AFP 2.x and earlier, or does it also rely on the host system's networking abilities?
I've made several appeals to Paul Pratt about adding serial port functionality and/or networking (as well as specifically to grab drivers for proprietary use of things like AppleTalk for interacting with vintage hardware). However, Paul has no interest in devoting resources to develop such functionality and no one else seems to either. His interest is more exclusively for emulating specific hardware as a platform to run vintage software. However, what Mini vMac offers is an ease of use that the other two do not. Setup and drag-and-drop disk images among those things. Plus it has one major thing going for it: ACTIVE DEVELOPMENT. Wake me when somebody starts working on Basilisk II and SheepShaver again ...