If you're traveling during rush hour, I think you'd be looking at a minimum 40 minute commute from Westerville to the west side. Pickerington would be at least that bad. Personally, I would avoid Pickerington like the plague, simply because the traffic is horrific.
Grove City would be a good option to cut down on your commute, I always hear that taxes are horrible but I don't know how they compare to the other 'burbs, everyone complains!
Dublin and Upper Arlington are pricey but folks who live there love it.