Thanks for all the thoughts. I ended up ordering a Gateway NV5927U for $595. The tech specs are:
Processor Intel® Core Core i5-430M Processor1 (2.26GHz, 1066MHz FSB, 3MB L2 Cache) with Intel® Hyper-Threading Technology
Operating System Genuine Windows® 7 Home Premium (64-bit)
Memory 4096MB Dual-Channel DDR3 1066MHz sDRAM
Hard Drive 320GB 5400RPM SATA hard drive
Display 15.6" HD Widescreen Ultrabright LED-backlit Display (1366 x 768 resolution, 16:9 aspect ratio)
Battery 6-Cell Lithium Ion (4400 mAh)
Chassis Chassis with Intel® Graphics Media Accelerator HD with 128MB of dedicated system memory supporting Microsoft® and Mobile Intel® HM55 Express Chipset
Convenience Features Gateway MyBackup Button, Touchpad Lock and Dedicated Numeric Keypad
External Ports (4) USB 2.0, VGA Port, HDMI Port
Keyboard and Mouse Full-Size Keyboard with Multi-gesture Touchpad
Media Card Reader Multi-in-1 Digital Media Card Reader (Memory Stick, Memory Stick Pro, Multi Media Card, Secure Digital, xD-Picture Card)
Modem 56K ITU V.92 ready Fax/Modem (RJ-11 port)
Network 10/100/1000 Gigabit Ethernet LAN (RJ-45 port)
Optical Drive 4X Blu-ray Disc/DVD-Super Multi double-layer drive
Sound High-Definition Audio Support, Built-In speakers, Microphone, headphone/Speaker/Line-Out Jack with S/PDIF support
Warranty 1 Year Parts and Labor Limited Warranty
Web Camera Built-In Webcam
Wireless Network 802.11b/g/Draft-N Wi-Fi CERTIFIED
I know it won't last as long as my PB G4 (6 years!), but hopefully I'll be happy enough. I've waited long enough. Take care, all.