I just did the same search you did, and ended up choosing a new home in a subdivision in Middleton. If you don't mind a short drive to all the major stores, it is a much nicer area and very close to the 84 freeway (the speed limit is 80mph in that stretch of the freeway, up to Fruitland). Your money for a house will go a bit further, so you can choose a better area, or builder.
If you absolutely have to be in Nampa, the areas East of, but near Lake Lowell are nice, as are some of the areas below LL. I almost bought in Nampa, but I ran into many areas that were nice, but too far from the freeway for me. There are also pockets of not-so-nice areas that are close to many of the subdivisions.
One example of closeness to major stores. From Middleton to the Costco in Nampa is 7.8 miles (15 minutes per Google Maps). It is almost the same distance from some of the nicer areas of Nampa.
Message me your phone #, and we can discuss what I discovered in my search, estimates on utilities and what builders to avoid on older homes. Lastly, if needed, I can refer you to a great, Pro-2A, real estate agent.
Eric