This time I have to admit that until quite recently I myself haven't known that 'You really got me' was not published by Van Halen as an original. Already in the sixties The Kinks produced this song. And also at that time it was anything else than a bad song and topped the UK-Charts.
Neverthelless I like Van Halens cover version better. They brought even more dynamic into this great song. So my vote goes to Van Halen.

Further information about the bands:

Kinks Fan-Page Most comprehensive Fan-Page I could find.
Included is also a huge list of all Kinks Covers. Quite amazing, that so many artists covered songs by The Kinks.
Van Halen News News about Van Halen. So many Van Halen sites exist, but so many are not up-to-date. This one is updated regularly.