Here are some of the things you might want to consider (from my experience with Sager 2260V Laptop)
This laptop does not have a plain serial port.
The built-in modem is a winmodem.
Both modem and ethernet use the same jack on the back of the laptop, so you will not be able to use both ethernet and modem at the same time.
The video controller (SIS630S) does not have it's own memory. It uses portion of system memory for a frame-buffer. This means that if you want a laptop to play 3D games, this laptop is not your first choice. And probably not a second choice either. I don't play games on my computers, so I don't care too much about video card performance. Your opinion may be very different.
This laptop has only 1 (ONE) PCMCIA port.
The battery is not hot-swappable. In fact, in order to replace the battery, you need to use a screw driver. Not a nice thing to do in an airplane seat ;-).
The good news is that battery lasts a bit more than 3 hours if you don't do anything CPU intensive. Of course, playing DVD full screen in Windows 98 will drain the battery in under half an hour.
Personally, I wouldn't want to buy another Sager laptop again. As you can see from my signature, I have IBM Thinkpad T23 now since Sager simply wasn't worth the headache and all of the little inconviences I mentioned above.