just to clarify it doesn't have any of the lever valve technology which a lot of people have been speculating. going from etek to ego you're paying for AT pipe, improved solenoid, valve technology, OLED board, improved ASA, metal parts, nicer milling.
can't say i see all that much appeal buying an etek 5 mind you, other than the reg grip its not a huge change from the etek 4.