I bought my copy of CN 8 from gpsnow.com. $127 shipped 2 day Fed Ex. I've used it for a week on my 60csx, so far great results. Autorouting is working great. You will want a larger memory card as I loaded only 4 regions of Western North Carolina, and 4 regions that include Philadelphia, Baltimore, DC, and South Jersey and it took almost 60mg of storage, which almost fills the preinstalled memory card.
I'm waiting on my 1gb microSD. Ordered it from Amazon, $44 including free shipping.
Hope this info helps.
NCFiddler <><