I think there is a big difference in the repetition rate of the noise. Your noise(s) seemed to repeat about once per second. The only thing that mechanically corresponds to once per second at idle is a complete revolution of the timing chain. Everything else is rotating faster than that. That balancer sound seemed different to me. I could be wrong of course. Good luck.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra