What killed my LBA was the recent
Ricoh lens debacle, where they advertised a good price for a lens on their official website for 3 days, and then canceled all the orders afterwards. I now see Ricoh as a two-bit company, doing everything they can to keep what little profits they have at the expense of their customers.
Unless a lens is dirt-cheap or at a too-good-to-resist price, I will no longer buy Pentax lenses. It's unfeasible to invest in any more lenses from Ricoh, which as a company may fold or go out-of-business at any time, considering their recent business practices.