<< Just got the GR370. Very nice lap, i have to agree the 16MB mobile radeon rocks the S3. also, the touchpad is much better then the IBM "mouse". but it doesn't come with a floppy drive, if thats important to you >>
I think you've got to be thinking about other things other than your constraints. If not, the IBM is a much higher quality laptop that is not a multimedia powerhouse in any sense. Three years warranty is standard and excellent. I have never been put on hold, and I have always talked to someone who was extremely courteous.
The only cons to my laptop are:
$$$
S3 Display
3 hour battery life
No firewire
I still love it though, and when someone offered to trade me their Powerbook 550 plus $500, I refused because my T23 was just too damn reliable, functional and more of an economically sound purchase. But that's a Mac Powerbook vs. an IBM T23. Against the Sony, I really think it comes to how much you're willing to pay and how much faith you have in that you never have a problem with the Sony.
The only other laptops that would cross my mind based on my requirements are the new P4 notebooks, and the Powerbook line. I would have been happy with the 12" iBook too🙂