Slip over and have a look at the Bliss cases we use, Scott. They will probably fit your requirements perfectly. They are, from memory, $75ex including a 300W Bliss power supply.
This is a plain non-fancy PSU that gives you a genuine 300W (i,e., much the same as the A-Opens you are familiar with, though a 300 rather than a 250). It is ample for entry-level systems. For larger systems (A-64 with medium-size video card, for example), we substitute a reasonably-priced Bliss 350 or 400W unit, keeping the 300W original as a spare to sell seperately (it works out that we sell more power supplies than we pull out of cases, so you won't get stuck with them, I shouldn't think).
The cases themselves are superb: plain beige (also available in black), tasteful, very solid build, plenty of room, no sharp edges, clip-in and screw-in drive mounting, no poxy mounting rails, BB 80mm case fan, space for more fans if desired (not needed in any sensible system though) .... in short, just about perfect.
You've probably seen them in our systems before. But pop over and have a look. (If you promise to be good, I'll even make you a cup of tea and make my small orange orangutan friend take the day off so as not to disconcert you.)