Haha, it was the RCA Studio II. Just looked it up on Wiki and as soon as I saw the pic it rang a bell... or very annoying loud buzzer rather.
I had the intellivision too (which I traded my old Atari 2600 to my best friend's little brother for) but I really liked it. Considered it a big upgrade from my Atari and almost couldn't believe my friend's brother offered to trade it for the 2600.