Hi Milo,
Well, Bootcamp is not really an emulator, its just drivers for native running on the hardware. Never used that solution myself, but can't imagine anything being wrong with it.... infact, if performance is top of the agenda, that will probably remain your first choice.
I used Parallels for a while, but found it had various limitations and its emulation was a bit basic in terms of what it emulated. But that was v5, maybe a little v6..... so things may have changed in v7.
Some reasons I settled on VMware (don't know to what extent Parallels have been playing catch-up) :
- At the time I switched from Parallels, I quite liked the stability of Fusion
- It also was the only product to support high screen resolutions
- Fusion had better networking, theirs is a low-level implementation
- I found Fusion had a better virtual drive performance
- The Mac version of VMware Fusion was also natively built on Apple software libraries, rather than Parallels reliance on some third party libraries.
- Support for a broader array of guest operating systems
- VMWare obviously have a bit of a pedigree in the virtualisation world, although its probably unrealistic to expect much cross-pollination from esxi to Fusion.