Steve,
Probably the top three in anyone's book are Harvard, Stanford, and
UCSD. U. Washington, Seattle is an up-and-comer and UCLA is also very
good. I graduated from Stanford, so I can tell you some about them if
you like; they're not particularly strong in HIV, but they do have a lot
of faculty. Let me know if you would like more details.
Sincerely,
Michael Maurice
drpfm at aol.com