"Actually you get less EMI since the Crystal frequency is the same - or even less. I have less EMI from a RD2 in 6 clock mode at 16.5 Mhz than in 12 clock mode running at 33 Mhz."

This is what i said, the higher the frequency the more EMI generated.
The question is why dont low speed devices die?
I dont know about prices but is atmel with 12 clock mode cheaper than philips with 6 clock mode? and so on.

Mahmood