In all honesty, I think it would be wise to consider the current offering. I understand your reasons for the vendetta, but you might be shooting yourself in the foot by not considering the current Sony products. But if you already have the K3, it is a moot point.
The same issue applies to many manufacturers of different devices. Just look at the GPSr (portable GPS) market, for example. Rather than fix firmware issues with the current model, they come out with newer models... with their own set of issues... but hopefully fixing some of the old issues.