I'm using 1.5K (in an 0805 package) as R1, and the 16Mhz crystals are from a chinese eBay seller.  I've got some 16Mhz, 20Mhz & 24Mhz crystals coming from Digikey and will replace the current crystals shortly and post the results.  I'm looking to get the same speed Bluestreak66 has reported with a 16Mhz crystal.