Valid fonts for pidgin.

Hi to all.

I want to change the font in the Pidgin buddy list, and I know I can achieve this modifying the gtkrc file.

However, I don't know the correct values for the font property. The default is "Sans 8", if I change the size ( there is no problem, the size of the font changes.

If I change "Sans" for "Verdana" I see the font of the buddy list changes.

However, if I put "Tahoma", "Trebuchet MS" or "Times" it looks as if I put the default of "Sans 8".

So the question is where can I check which are the right values to change fonts in the gtkrc file? Is there a config file? Are there only a handful of options?

Thanks in advance.