I would question the line: "Because Macs tend to hold their value better than PCs do".
In a computer magazine (PC Authority) for October of 2003 for $1799 (AUD):
-Intel Pentium 4 2.8GHz
-512mb DDR Ram
-19" CRT Monitor
-GeForce-4 MX-440 64MB
Windows XP Home
5.1 Channel Stereo Sound with Subwoofer
Multimedia Keyboard+Scroll Mouse
Compared to the Emac, which I found on Apple.com.au/Store with the following specifications, with a price of $1899 (AUD):
-17" CRT Display
-1GHz G4 Processor
-ATi Radeon 7500 32MB
-Firewire and USB ports
-10/100 Networking Support
-Mac OS X 10.3 "Pather"
There isn't much comparison, the monitors and hard disks are the same, but the P4 is 2.8ghz compared to 1ghz, and features double the memory, not leaving much room for comparison.