Join Date: Jun 2012
Location: Central Texas
Bikes: Motobecane Vitus 979, Bridgestone MB-1, S-works Roubaix, Wabi Lightning SE
I was going to get a 510, but found the 810 performance and navigation package from wiggle.co.uk in England for $405, so I went for that. Received it in 5 days with no customs duty. It comes only with plugs for Europe and Great Britain for the charger, and so far I have not found any aftermarket US plugs, but any USB charger will work - I use my phone charger. Also comes with Europe map, not US, but I got the current US map for $30 on Amazon. I will use the Europe map in my auto GPS next time I go over there. All in all, for the price I thought it was a worthwhile upgrade over getting the 510 from a US vendor. That said, I haven't found the map and route feature that useful so far, since I have not ventured too far from my usual routes. I am taking my bicycle on a road trip next month and expect to depend on maps more at that time.
One thing the 510 has that the 810 lacks is the ability to use the soviet GPS satellites. That is supposed to speed up satellite acquisition, but my 810 by far outperforms all my other GPS units in getting satellite lock anyhow.