Morristown might be similar to what you’re looking for. It’s a bit smaller than Montclair but very walkable, nice selection of food, shopping, and entertainment, and feels very safe for me (an anxious young woman) walking alone at night. It’s about 45 minute drive to NYC as well. Not sure exactly what the rent cost situation looks like though I haven’t looked there in a while. Although I’m pretty sure you could find something if you’re not looking for super big or fancy and are willing to go on the higher end of your budget.