Offset pod is really a prefrence thing,I've seen guys be fast with and without it,just depends on the rest of the setup,for asphalt oval go with a solid HD pro 3 best car on the market for that type of racing.
i think the thing that everyone is overlooking is the way he asked the question, he is saying should he get a car with or with out offset pod. the car that has the pod offset is fully capable of putting the pod back straight up. its an adjustment built into the car, just a differant set of holes in the chassis plate. so the best general choice, is get a car with an adjustable pod and try things both ways.