Arduino Uno with crystal
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.