You get what you pay for and.....
... . you pay for what you get. I went the Rixon 19. 5 inch route (all seven including the spare) just over a year ago and have had no regrets. Yes, the up-front cost was not insignificant, but I plan on keeping the truck and these tires & rims for a L O N G time.
I'd also agree with CDrake in this thread that the ride and handling is far superior and IMHO, the 19. 5 inch set-up should really be a standard ex-factory option. The Yokohama TY303s are barely scrubbed-in now and have more than met my expectations!
Even more important, given my current location, is customer service; Dan and Matt extended every courtesy whilst I was stateside travelling from west coast and Canada upto Sparks, Maryland last year - they even helped me locate a fellow TDR member who was looking for a complete set of standard factory 16 inch tires and rubber, which we shipped back to the mid-west and the last I heard from this TDR member, was that he was very pleased with the deal.
I'm sure there are and will continue to be, other 19. 5 inch alternatives out there but check out their attention to the details like wheel balancing in particular, when you make your purchase. It makes a heck of a difference. Good luck!!