Page 2 over at ESPN is running a feature ranking all 80 Super Bowl teams and your 1989 San Francisco 49ers are ranked #1. Additionally, the 1984 49ers are 5th, the 1994 49ers are 11th, the 1981 49ers are 25th and the 1988 49ers are 42nd.
For those keeping track, only the Steelers with 3 and Cowboys with 4 have as many teams in the top 20. Makes sense since those are the 3 biggest dynasties of the Super Bowl years.
An interesting comment appears at the end of the description of '89 team:
Do you have a favorite among the 5 Super Bowl winners? I'll put a poll up for it, but feel free to also discuss it here.