Without question, WRTI, 90.1 out of Temple University in Philadelphia. Classical from 6 a.m. to 6 p.m. and Jazz the other 12hr. Knowledgeable hosts and programs like opera, Latin jazz and live broadcasts and interviews with various artists. Only drawback is that it is public and spend too much time begging. WXPN, 88.5 is the student-run station from my alma mater, Univ of Pennsylvania. As with any student run org, runs hot & cold, but does have good blues and other programming.
As for tuner expense, one can purchase pieces from the "great tuner era" of the '70s-80s' for very little. Spend $200-500 for a recap and alignment by a 'known good' tuner tech and have an excellent piece of gear that is as good or better than the best offered today, with the possible exception of the TOTL tuners from Accuphase or Dynalab (for many $$thou).
For tuner folks, this is probably the best information website and their Yahoo forum is very good.
http://www.fmtunerinfo.com/