It's been quite a long time since a review was posted, but Virtual ][ is an excellent, excellent emulator. There are a few different Apple II emulators around, but Virtual ][ provides the best experience by far. Supports a lot of models and different internal options and cards, and a great attention to detail (perhaps my favorite example of this is the fact that the disk seek noises are actually faithfully reproduced in real time). Supports a lot of image formats and interacts well with ADTpro, good host integration including the ability to mount a folder as a ProDOS volume. And it is actively maintained. Much cheaper, better connected, faster (if you want it to be), and more space efficient than the physical machine, and you'll never any need to reseat or replace the RAM chips.