I would never recommend getting a case with a psu, as these are always generic psu's and never run at their rated output. And always have all the cables attached so you have an untidy case, this can also interrupt airflow. The psu is about the most important component you can buy for obvious reasons

I honestly recommend getting a case without a psu. Antec 900 would suit your need, and it has a side window. Its also a very good case for the money.

For a psu, i'd go for an Enermax Liberty 400w as its a modular one so you only need to connect the cables you need. (I'm guessing at the wattage because you don't quote your system spec).