Actually the standard font of Vigilance is quite ok I found. It's very readable (thats why newspapers use this kind of font) and not tiring to the eye. I'm also using Vigilance theme. But I see you have that Typekit thingy, so you could change fonts there, just remember to add the right classifyers (that correspond to the side bar/widgets). If you don't know, classifyers are little codes like: h1, h2, h3, h4, body etc. which represents stuff like headings, body text etc. You have to check you CSS file and see which classifyers are your sidebar and then in Typekit, it'll ask if you'd like to add classifyers, and you just add it there. I also tried Typekit and there are quite some nice fonts, but I just couldn't stand that Typekit button stuck in the bottom-right corner scrolling with the page. I'd rather have it shown as a logo in de sidebar.
Anyways, hope this helped!