OK, I bit the bullet and bought a Mac. I got the iMac instead of the Powerbook because I liked the monitor and the $1100 less purchase price.
Stats: 20" widescreen active matrix LCD display, 2.4 GHz Intel Core 2 Duo processor, 4MB shared 1.2 cache, 1GB of 667 MHz DDR2 SDRAM, 320GB Serial ATA hard drive (!) , Slot-loading SuperDrive (DVD+R DL/DVD+RW/CD-RW), ATI Radeon HD 2600 PRO graphics processor with 256MB of GDDR3 SDRAM, Built-in iSight video camera (!) , Built-in 10/100/1000BASE-T Ethernet (external DSL and cable modem ready), One FireWire 800 port; one FireWire 400 port; three high-speed USB 2.0 ports, Built-in AirPort Extreme wireless networking, Built-in Bluetooth 2.0 + EDR (enhanced data rate), Audio: built-in stereo speakers; integrated microphone; optical digital audio input/audio line in; optical digital audio output/headphone out, DVI video output; VGA video output; S-video and composite video output, wireless keyboard and wireless Mighty Mouse, Mac OS X, Safari browser, iChat AV, iLife (iPhoto, iMovie, iWeb, GarageBand, iDVD, iTunes), Photo Booth, iCal, Front Row, Spotlight, Dashboard and more. Phew, I just copied that off the box.