lazyweb inquiry: new desktop PC
So I'm buying a new desktop PC because the one I'm using now is sad and slow. What's the general configuration of a lower-middle-end machine these days? I would like it to be able to convert video files from one format to another or run casual games like the Mystery Case Files series without having to close down every other program, but I don't need to do complex video editing or high-end gaming or anything like that.