um.. you dont pay for updates with Mac OS X.. You get 10.4.1,2,3,4 etc. you pay for an UPGRADE same as going from windows xp to vista. the fact that apple called each os release 10.something may be bad marketing on their part but you are getting an upgraded os.
What do you mean they would have to go to system 11 to be more secure(do you mean x11 like the developers tools)?? Leopard encorporates many new security features. look it up. And what do you guys mean when you say not as secure? OS X still doesn't have to deal with viruses/adware/malware/spyware
And I honestly don't see why this debate is still going on? Mac's can run windows now... best of both worlds.
The only arguement left is price. Ah not so lets do a little comparison on a similar config:
DELL XPS
Intel® Core™ 2 Duo T7600 (2.33GHz, 4MB L2 Cache, 667 MHz FSB)
Genuine Windows® XP Media Center Edition 2005
No Express Upgrade to Windows Vista Selected
17 inch UltraSharp™ Wide Screen UXGA Display with TrueLife™
2GB DDR2 SDRAM at 667MHZ, 2 DIMM
160GB 5400 RPM SATA Hard Drive
8X CD/DVD Burner (DVD+/-RW) with double-layer DVD+R write capability
256MB NVIDIA® GeForce™ Go 7900 GS
Integrated Audio
Price: $3104USD
APPLE MacBook Pro
2.33GHz Intel Core 2 Duo
2GB 667 DDR2 SDRAM - 2x1GB
160GB Serial ATA Drive @ 5400 rpm
SuperDrive 8x (DVD+R DL/DVD±RW/CD-RW)
MacBook Pro 17-inch Widescreen Display
Backlit Keyboard/Mac OS - U.S. English
Accessory Kit
Price:$2799USD ($2239USD w/ADC)
Nearly an identical spec and the apple is cheaper (much cheaper if you include the ADC). This also doesn't take into account the sheer beauty of the Mac. I don't understand why anyone would buy a different high end notebook? The only PC I can see why anyone (including myself) would be would be a gaming desktop.