Windows Vista Business
Windows Vista Business is essentially warmed-over Windows XP. If you're currently happy with Windows XP SP2, we see no compelling reason to upgrade. On the other hand, if you need a new computer right now, Windows Vista is stable enough for everyday use.
Microsoft Virtual PC for Mac 7.0
Microsoft Virtual PC for Mac 7.0 is slow and a bit expensive, probably because it includes a Windows license, but it's cheaper than buying and maintaining a real PC--even a low-end one.
Microsoft Windows XP Home Edition w/SP2
We recommend installing Windows XP SP2 but only after Microsoft has had a few weeks to work out the kinks.
Microsoft Small Business Server 2003
For small businesses that need a business in a box and want to stick with Microsoft technology, SBS 2003 is the only game in town.
Apple Mac OS X 10.3 Panther
Panther adds new and useful features, but at the expense of some old standbys. Current Jaguar users need not apply.
Virtual PC 6.0 for Mac
Virtual PC 6.0 is the best way to run Windows on OS X, but it's not worth the price for older Macs.
Red Hat Linux 8.0 Professional
Red Hat remains a solid Linux contender, but Windows switchers or dual-booters should stick with SuSE for easier installation.
Microsoft Windows XP Service Pack 1
Windows XP's first service pack is a worthwhile download--if only for the security patches--as long as you have the bandwidth. If not, you're better off piecing together XP fixes in smaller, single downloads.
Pricing not available
Mac OS X 10.2 Jaguar
Take a good, hard look at Mac OS X 10.2 if you're adding a Mac to a Windows network--Jaguar's new tools can't be beat. But home users, beware the $129 upgrade price if you're not looking for networking options.
Microsoft Windows XP Home Edition
Despite its many annoyances, XP is a worthwhile upgrade. Unless you need corporate administration tools, XP Home Edition should suffice for most--even for small businesses. Enterprise customers, look to Professional Edition.