@duydangle: I thoroughly hate Helvetica, so I can't help you there

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I find Futura bold enough, but I'd wager finding a decent bold sans font won't be very hard. I like Futura, and I'm not a big fan of sans in general, so, again, not much help there

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As for Caecilia, you can look at the Google Fonts Directory for other serif slabs, but I'm partial to Museo Slab, FWIW

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