I am going to order the 510 now one final question. Does it matter where I order from or are they all the same and just have different logos?? I want to believe with the difference in some of the prices that there would be a difference in the product or is this truly a case of "paying for advertising"? Please let me know I would like to place the order today but there is a big difference in paying 35$ and 70$ for ultimately the same product.