I like the AOpen H450B, because it has a 120mm fan in the back and a place for an 80mm fan in the front, USB/, Audio, and Firewire jacks in the front (at least on the model I plan to get), and one of those TAC side holes. It's steel.
I'm not sure about the included PSU and I haven't been able to find out much about it, other than the fact that it is regular ATX size and so can be easily replaced (for example, by a Seasonic S12, that's my plan).
A screwdriver is required for installing drives, etc., and I don't know if it's available in the US (I'm in Europe). Here's a review, w/pics but no PSU info:
AOpen H450B
Where I am, these cases include the 120mm fan in back and a 300W AOpen PSU standard.
If I were in the US, I'd probably get one of the
In Win mATX towers mentioned earlier. Maybe
this one.
The In Win Z720T was recommended in the
Ars Technica "Ultimate Budget Box" guide last August, which suggests that it's PSU is probably fine. I think it's supposed to be a rebranded Fortron, but I don't remember where I read that.
Here's a review of the Cooler Master Centurion 541, if you haven't seen it:
Text
I'm just waiting for more mATX boards with the NVIDIA 6150/430 chipset to be released... rumour has it that DFI will be releasing such a board in mid-December.