Most of the lower prices that you're going to find are going to be from eBay, which isn't that bad of a place to shop online now-a-days with the whole buyer protection thing. The Toshiba Satellite series is very good (mine's an L675 and I have experienced no problems when doing the things you want to do). A good way to shop based on price, that I've found, is Google Shopping. Here
, for example. The only downside to that is you need to know what you're looking for. As for an actual recommendation, I would say definitely go with the Toshiba Satellite C655 (here it is
on the Toshiba site if you want to see the specs).