Upload & Sell: On
I agree with Ken on pretty much every point. The NEX system is growing, but still doesn't have nearly the lens selection that micro 4/3 does. The nicest thing about m4/3 right now is that you can do a full range with consumer grade lenses that are decent, and you can also do a full range with pro-grade lenses as well. There are several very good primes at the $500 mark and below (14/2.5, 17/1.8, 20/1.7, 25/1.4, 45/1.8, 60/2.8 macro) and several more expensive, but very good primes as well (12/2, CV 17.5/0.95, CV 25/0.95, Oly 75/1.8), two very good ultra wide zooms, two f/2.8 high end zooms, and more high end gear coming (43mm f/1.2 and 150mm f/2.8 from Panasonic...some f/2.8 zooms from Olympus).
On the consumer side, the Panasonic 14-45 OIS (not the 14-42) is really outstanding, and the Panny 45-175 and the Olympus 40-150 are both quite nice consumer-grade telezooms...much sharper than consumer grade telephotos I've used for DSLRs.
Grabbing the Oly 9-18, Panasonic 20/1.7, Oly 45/1.8 and one of the consumer telezooms is a relatively inexpensive and quite capable little kit. Very small too.
Best kit for $1,500...I'd probably choose a Panasonic G5 with 14-42 kit zoom (not quite as good as the 14-45, but the kit is $500 right now at Amazon...same price as body only most places), Panasonic 45-150mm ($270) and either the Olympus 9-18 ($600 at B&H until tomorrow) or both the 20mm f/1.7 and Oly 45/1.8 ($350 and $400 respectively).
That gives you a pretty flexible kit for either $1,370 (with all zooms) or $1,520 with dropping the UWA and gaining the 2 primes. As much as I love UWA, I'd get the two primes if going for the most flexible and capable kit...an ultra-wide can always be purchased later.
Sub out the E-PL5 for the G5 if she doesn't need a viewfinder and wants the smaller package with IBIS. You'll add $100 with the Oly 14-42 over the G5 kit right now.