As for 46845; I have lived there too, and the Northwest Allen County school system is good. I feel that parts of that area are not as "safe" as 46814, but in general it's fine. You can find crime statistics online for both zip codes. Before you rent a place, make sure that is the school system, and NOT Fort Wayne Community Schools.
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I actually lived in Toronto for a bit before returning to Fort Wayne! I grew up in an area with the 46845 zip code and the Northwest Allen schools are wonderful. I currently reside in Dupont Lakes Apartments, and they are a great bang for your buck! Not as nice as Steeplechase, but not bad at all. Otherwise I would reccomend the 46835 area code. Maysville and Stellhorn roads are nice and family-friendly. There is plenty of close shopping and parks within Arlington Park neighbourhood (also one to consider!)
I hope everything works out for you! I loved growing up in Fort Wayne, in both Arlington Park and the Northwest area!