
The 855 in the tecra in my sig palys DVD's without a glitch. Heck even the 8mb S3 in my old P3 can do that.
The only real benefit of a dedicated card is for 3d apps. Some say that having one makes the laptop all around snappier, which could be true, but if you keep the OS clean and have enough ram it will run plenty snappy even with an integrated card.
In OP's situation, I wouldn't look for anything with a dedicated card, but when it came down to deciding between 2 laptops, all else being the same or if I had the option for it I'd go for a low end dedicated card. Don't let the card be a deal maker/breaker for you.
As for what else to look for, just get a big enough hard drive for what you need and have plenty of space to grow into. Also go for either a 5400 or a 7200 rpm. Unless you're a power user, you won't really notice much difference between them, but both are substantially better than a 4200rpm drive.
Make sure to get enough ram. a single chip of 512 as the absolute minimum (that would make it easier to upgrade to a gig or more if youwant to later on), but a gig would be better (either 2 x 512 or 1 x 1GB).