Thats true. And don't get me wrong, I am as impressed with B series as you are, but you hit a good point in your response. Both the Fs and Ks are too expensive at the moment for alot of people to do any tinkering with them. Again, I agree with you that people will probably explore more with Fs when the price is not so high. The cost of doing FI on an F will quickly exceed $10k, so I am not trying to go there for a while...