I found something! Maybe. The dm3z customizable laptop by HP is actually fitting my bill.
AMD Turion II Neo Dual-Core K625 (1.5GHz, 2M L2 cache)
512MB ATI Mobility Radeon HD 5430
4GB DDR3 System Memory
320GB 7200RPM SATA
13.3" diagonal High-Definition LED
for $700. It's technically exactly what I'm looking for, but the customer care package is a bit pricey and the return policy without it is only 21 days.
I know I didn't buy the extended warranty on my last laptop and it is lasting me 5 years (an Acer no less), but I'm not sure how planned obsolescence is playing out these days, especially with HP. Any thoughts?