You can find walkable, safe neighborhoods all across the city, so it will likely come down to the location of your work, and the type of lifestyle you prefer (laid back, in the scene, family life, etc.). I live on the west side myself, so I'll speak to this area.
What is a Concave Wheel? Concave Technology takes the center of the wheel and dips inwards to give it that bowl effect. Rather than exaggerating a bigger lip for the back wheel, and a smaller lip for the front. Concave wheels emphasize the concavity of the rear wheel to differentiate from the front wheel.
Why balance a BMW motorcycle wheel? It is very important to balance motorcycle wheels. Wheel wobbles are related to wheel balance in some cases. A properly balanced wheel makes the small shakes go away and the rider will feel more secure at speed. An unbalanced wheel may lead to uneven tire wear and/or a crash.