I would like to pickup this watch. Amazon has it listed from a seller for $240 with a manufacturer warranty. A few other sellers have it for about $180 but with an Asurion warranty. All of the sellers I am considering have a very high feedback rating. Are there pros and cons of buying the watch with the manufacturer warranty or should I just get the cheapest? This will be my first Gshock from Amazon. I have Amazon gift cards so I have to buy it from Amazon. Thanks for any feedback!