If your wife is not concerned with a variable voltage device, then I recommend the Kanger Evod kit. Low price, the 2 650mah batteries are stylish and color coordinated with the included evod clearos, and creat a sleek, finished appearance. I mention the Evod, because the batteries are regulated at 3.7 volts, unlike the typical unregulated eGos, so the vape remains more consistent.
If however she is looking for a more adjustable vape, the iTaste 3.0 really brings a lot to the table in an eGo-sized form factor.
For a really long lasting, durable, all around mod that still is "purse-friendly", the Innokin MVP 2 is indeed an excellent choice! If she is fashion conscious, they can be found in a variety of more, shall we say "blingy" finishes, or can be adorned with any number of jwraps.
As an earlier respondent noted, I have noticed that the MVP 2 seems to be a favorite mod amongst female vapers (Not that my black MVP 2 is by any means gender-specific!)