>Manufacturers provide drivers for Windows/Mac
Only partially true for Macs. I'd still research compatibility in some cases, especially with stuff like scanners.
Things might have changed in the last 3-4 years but when I last bought a scanner (Fujitsu 1500 Scansnap, lovely gear, works fine on Macs) there were still gaps in Mac scanner support for some other manufacturers. Don't let the I-got-it-working blurbs on forums fool you, some of these things will not work easily, if at all. Of course, chances they won't work with Linux either.