Derby made it in Family Circle's Best Towns for families. It is considered a local hot spot, with a lot of growth lately and a lot of new building, with great schools. It's not that one town is better than another, but a personal preference. Derby is still fully in growth phase, and not yet experiencing the stagnation that Wichita has recently developed in prices.
You'll hear prices are going down, yes. They've recently started going down a bit. But you'll run into a lot of sellers that are upside down and can't lower the price even a dollar without owing at closing. It's a buyer's market, but it's still a hard one. There is a LOT of selection out there though, so it is still a pretty good time to buy! Sellers want to be negotiable, but many just don't have that leeway. Keep that in mind, get pre-qualified, and you should have your pick of homes!