The base 15" Retina MBP will give you much better day-to-day performance than either of the standard 15" non-retina models because of the SSD/Flash Storage.
Aperture should also be great on the retina display. You basically have a full 5 megapixel display for viewing photos. The base non-retina model has a roughly 1.2 megapixel display.
Besides the pixel count, the retina display is also an IPS display with better contrast, black level, and viewing angles.
Apple has also already updated Aperture to take full advantage of the retina display.
If you can afford it I would say go for it.