Sympathies for your loss. My dad passed six years ago. Miss him dearly!
Personally, I think you made a good choice. Having come from a MOPAR family, I know a few things about the Durango that have hindered me from getting one. The Durango (especially generation 3 & 4) are way under powered for their size. Even the V8 models leave something to be desired. They are generally overpriced for what you get. And, they're also notoriously a mechanics nightmare.
The Nitro on the other hand is a better option, IMO. Yes, it is somewhat under powered, but it can get up to speed fairly quickly. They are generally easy to work on, and decently priced for its class. The one advantage that the Nitro has to most similar sized vehicles is this... The engineer's actually gave the Nitro some additional thought in its creation. For example: They moved the wheels as close as they could to all four corners of the vehicle, giving it more stability, which means it is not as top heavy as most SUV. Because of its wheels being pushed outside the fender (instead of inside the fender well), it handles very well, and doesn't lean on sharp turn like the average SUV. Overall, the Nitro is a fairly well thought out design.
Is the Nitro perfect? No. But what vehicle is? Despite what vehicle you own, there will always be some design flaw that could have been designed better than what it was. With that said, Enjoy your Nitro! And be proud that you own one of the most unique (and good looking) SUV on the road. Both in design, and aesthetics.

JM2C