Really sad, and 64 is way to early to leave.
I bought their first on casette as my 4 one (I think). After Deep Purple, Black Sabbath and Uriah Heep, if my memory serves me right. Really refreshing
As a sidenote: When listening to songs co-written and sung by Sammy Hagar (at 18), is clearly show how much impact Sammy had on the song writing in the "Van Hagar" area (I even think he held VH together for some time).
R.I.P Ronnie Montrose.