If PG get BiabWin working good in Wine then you would not have update/upgrade issues, not matter what Mac version you use or update to it will just keep working. You will also get the latest version and not have to wait 6 months for it to be translated to mac.
When I tried it under Linux there are only a few issues that need fixing to work well on Wine, it was as fast as Win or faster.
The main issue was it needed Windows Media Player to play the wma demos and this didn't work under Wine.
You can use Parallels Desktop but then you need to buy it as well as Windows.