Do yourself a favor and order an ego. You can always pick up a 510 or 2 later, as they are much cheaper. Mine is on its way after struggling with a battery nightmare trying to keep batteries charged for my wife an I. They last me about 2 hours, where the standard ego is supposed to last 6, and the kits come with an extra battery.
Make sure and look at all the things that each company offers in their kits, as they vary slightly. Also look for the joye brand. I think Riva has similar reviews as well. buy from one of the suppliers recommended in here.
Make sure and look at all the things that each company offers in their kits, as they vary slightly. Also look for the joye brand. I think Riva has similar reviews as well. buy from one of the suppliers recommended in here.