I don't know if the case is uATX, but the old motherboard definitely was labeled as such. uATX is the same as Micro ATX.
Old psu - 5.9W x 3.4H x 3.9D Inches (Micro ATX)
New psu - 5.9W x 3.4H x 6.5D Inches (ATX)
The old psu was shorter in length, which made it easy to insert between those brackets. The new psu, even though a bit longer, would not interfere with the dvd cage. If I could make it work, it would leave me with 3/4" of space.
I've stayed on course with my budget so far. I planned on upgrading everything, including a new case...yet hoped to avoid it if I could. No worries.
As Murph said above, I'll need something with shiny blue lights!