I love my K9 too. Was in the market looking for a reincarnation of the Lincoln Towncar and found the K900. The dealer gave their best version of VIP treatment when I pulled the car in for service, though the lack of facilities cannot be helped.
Am increasingly convinced Kia will fail to sell high end vehicles unless they separate the K900, and for that matter any >$35k cars / SUVs they want to sell), into a separate brand a la Lexus in the 90's and Genesis today.
But for someone who drives their cars until the wheels fell off, the K900 is a great used car buy; especially in CPO form. Great car at affordable prices w/ killer warranties and not one other in town, what's not to like?
For any Kia execs who frequent this forum: I know you've a chicken-and-egg conundrum -- should you wait until the pricey vehicles sell at a high-enough volume to justify building a new franchise, or should you invest (more like forcing your dealers to invest) in luxo-dealerships and wait for, or hope for, the volume to follow suit?
I believe Lexus, and to a lesser extent Acura, already gave you the answer.