I agree with Eug. Don't predicate your decision on the single issue of whether or not the notebook has a built-in Ethernet port. That can be added.
I'd say don't get hung up on brands. The advice in this paragraph may be hard to follow, since you may not be able to get a look at the systems first-hand, particularly those like Dell that aren't sold out of stores. Look at examples of each model you are considering, holding them on your lap, trying out the keyboard and screen, checking positions of key items like CD-ROM tray and floppy slot to be sure that you can use the system comfortably. If you have to have access to all devices all the time, then don't get a system that forces you to choose between floppy and CD-ROM. (Using an external floppy can be a PIA when you're traveling.) And while we're talking about it, notebook computers don't work well on the lap. They run too hot. If you wish to hold one in your lap, get a lap board -- to protect you from heat, and to protect the notebook from overheating (possibly). Also, check the unit for sturdiness. If you want to carry it around a lot, be aware that some of these puppies are FLIMSY! I'd say that top-of-the-line IBMs and Toshibas are sturdiest among the most popular brands. I like Fujitsus, but some of them have the stupidest pointing device I've ever seen. Some Dells are sturdy, and some come apart as though they were made of cheap cardboard. (I've owned Dells, Toshibas and IBMs. Enjoyed them all for the most part.)
Since you plan on using the unit "on the road" (literally) a TFT screen is an absolute must. Those dual-scan technology or "high performance" screens that look so nice an bright indoors will be washed out to the point of utter uselessness when you're out-of-doors. (Even TFT can be pretty hard to read in such lighting conditions.)
You said that you don't want to go heavy on apps, but then mentioned Word, Excel and Photoshop. Well, Word and Excel like lots of memory, but Photoshop adores it. I wouldn't think of using Photoshop on a system with less than 512 MB RAM. Remember that a notebook computer is going to have a SLOW hard drive. Some are faster than others, but you will NOT be blown away by the speed. A unit that swaps Photoshop or anything else constantly to disk will drive you crazy.
Oh yes, W2K on a notebook is a far better OS than Win98SE or WinME. It actually makes most systems feel as though the hardware has been upgraded. It really is that good. But you might wish to wait for Whistler Personal if you're not into systems. NT-based OSes are a bit more unforgiving of things like configuration mistakes, especially security setting errors, than the consumer Windows OSes.
So let's see: TFT, 512 MB RAM, 4 hours battery life -- uh, I think that's gonna cost a lot more than $1,000 to $1,500. If you find those features for that money, you've gotta promise to post a link!
Good luck!
Regards,
Jim