I bought from SW Kia in oak cliff, I think all the Dallas/Plano dealers are owned by the same company. They were OK, pretty much average for all DFW dealerships. They do have a pretty big selection. Before I bought this car, I was buying Dodge trucks, I NEVER bought from a local dealer.
for sales, i dont know but for service i will definitely recommend southwest Kia in northwest hwy. I have completely mod my car and they dont care about it and still warrant my car not like other dealers that gives you a hard time because you change something.