hmm.. how do i put this as simple as possible.
"Macs work for you. PCs make you work."
What's the difference between windows and osx?
Windows is fat and slow with lots of strings attached at every corner (due to stupid registry), OsX is slim and fit (has no registry).
To those that say Mac peripherals (add-on cards) opens cans of worm.. maybe you should trying putting in a card that is Made for Mac

I have a PCI GPU, a eSata2 PCI-X and a FW800 PCI card inside and all works fine without even having to install a driver from a CD.
Ever since buying my first G4 powerbook, I've never looked back. Less hassle, less stress, less braincells spent making things work. Productivity increases, time is saved.
Had PCs from the first 8086s and every model through to the P4. Ran every OS from DOS 1.0 through to XP. Encountered every virus from Pakistani Brain to whateveranchiladapox. Reformated every kind of hdd from 10mb Seagates to 300Gb Maxtors every six months. All thanks to Microsoft. Also dabbled with variants of UNIX from Santa Crux Xenix to Linux.
What did I learn? A lot. What did I do? Waste time.
Got OSX. Never looked back.
Main workstation:
Powermac Dual G5 2.0
7Gb RAM
4.7Tb HDD
Gf4 5200 (el-cheapo)
ATi 9200 (el-cheapo)
Sony G520 (2048x1536)
Lacie 321 (1600x1200)
Client viewing station:
Macmini 1.3Ghz 1Gb
Wife's connection to the net:
Powerbook 1.3Ghz 1.2Gb
Paperweight:
3 units Intel P4 3Ghz 2Gb in rackmount casings rusting away (until I can find a easier way to run OSX on these)
What do I do?
Produce pictures for people on their wedding day/adverts/homes
Sometimes edit HD1080 videos for the same people.
Write emails
Browse the web
Run RC aircraft simulators (X-plane)
Chat
Burn DVDs
Print DVDs
Print Pictures/Posters
Maintain websites
FTP
All on a lowly Mac that has not yet failed to deliver on any of these.
*Though that said.. an iMac with 2Gb is only ok to do consumer level work. Powermacs/MacPros are the powerhouses of the Apple family and should be your choice for high efficiency workflows.