The 'City is a really popular bike with a lot of riders, but I think these riders may not have much in the way of hills they need to deal with regularly. That being the case (no hills) I would be the first to agree it's a great bike, but otherwise, it's in need of a little (lot?) more power. Direct drive rear hubs, like the one the 'City uses, are now pretty unusual when it comes to new ebikes, with most having been replaced with gear driven rear hubs - a HUGE improvement. Not only are they more efficient at low speeds (say under 15mph), they're much peppier when it comes to accelerating from a stop, or climbing a reasonable hill.
That being the case, Espin may be worth looking into, or maybe Ride One Up (R1U). These are both reasonably priced and use fairly generic parts so they'll be easy to service as they get older....
And last thought, MANY (most?) of us really struggled laying out that 1500 bucks for our first bike. Of those, I think the vast majority will tell you that purchase was a game changer in their lifestyle, and generated a smile that didn't go away for months. I can assure you that once you've made that leap, you're very likely going to find, as I did, it's MUCH easier to lay out even more money for your second bike....
-Al