user6834: Are there Arduino UNO R3s which use a crystal instead of a ceramic resonator? 
(Frankly, I don't understand this cheapness: if you really want to save on component cost you can run both AVRs on the same crystal. The 16U2 always has a crystal.)

user6834: It appears that the Arduino Leonardo uses a crystal:

On the Sparkfun site it's the same price as the Uno R3, so I think I'll go for the Leonardo.

user6703: Some of the Freeduino boards use crystals although the newer ones now use a cheaper USB to serial chip (the CH340) instead of the Atmel chip used on the Arduino Uno.
The diavolino is another build-it-yourself board that has a crystal. I am sure there are many others. The ruggeduino is another that uses a crystal and also markets itself as being practically indestructible. Their "How to Destroy an Arduino" is well worth a read for things to avoid doing to your Uno.

6834: <p>Are there Arduino UNO R3s which use a crystal instead of a ceramic resonator? </p>

<p>(Frankly, I don't understand this cheapness: if you really want to save on component cost you can run both AVRs on the same crystal. The 16U2 always has a crystal.)</p>
 6834: <p>It appears that the Arduino Leonardo uses a crystal:</p>

<p><img src="https://i.stack.imgur.com/flmUx.png" alt="enter image description here"></p>

<p>On the Sparkfun site it's the same price as the Uno R3, so I think I'll go for the Leonardo.</p>
 6703: <p>Some of the <a href="http://www.freeduino.org/about.html" rel="nofollow">Freeduino</a> boards use crystals although the newer ones now use a cheaper USB to serial chip (the CH340) instead of the Atmel chip used on the Arduino Uno.</p>

<p>The <a href="http://shop.evilmadscientist.com/productsmenu/tinykitlist/180" rel="nofollow">diavolino</a> is another build-it-yourself board that has a crystal. I am sure there are many others. The <a href="http://www.ruggedcircuits.com/ruggeduino" rel="nofollow">ruggeduino</a> is another that uses a crystal and also markets itself as being practically indestructible. Their <a href="http://www.ruggedcircuits.com/10-ways-to-destroy-an-arduino/" rel="nofollow">"How to Destroy an Arduino"</a> is well worth a read for things to avoid doing to your Uno.</p>
