I saw a K5 in grey a couple days ago in the zoo parking lot. Looked pretty good. I still think the TLX looks better, but how much better? Everything else equal, I might be wiling to pay $3K for the TLX looks.

 

For me, it's not even close too, I actually liked the previous Optima design more except the new headlights are pretty sweet tho I'm not a fan of amber, also the TLX interior to me is just 1 of the best looking right now at this price minus the missing digital dash but it still looks decent.