I would think you’re pretty much covered either way; the SanDisk warranty or the Best Buy extended warranty. It may be less hassle with the BB warranty as you can probably just exchange it same day. Having SanDisk take care of it, you have to contact them to get an RMA# for return. They’ll e-mail you a link to a pre-paid shipping label you can print out at home and send it back to them. Then after they receive it and verify that it is a warranty-covered issue, they’ll send you a replacement.
While it’s nice that SanDisk will take care of their customers and stand behind their products, it does make it a little inconvenient being without your player all that time. Whereas you can simply take it into your nearest BB and walk out with a new one in a few minutes. The only down-time is what you have to spend re-loading all your music, etc. onto the new one (and don’t forget to back it up on you computer before you take it back).
