Reply to Where and How should I buy these?

After much research I believe that I have decided to get the Sennheiser HD25 Originals (blue Adidas ones). I saw them on the Best Buy website for the best price online thus far. Though the website "unique squared" says they will match other lower prices found online. I'm not the biggest Best buy fan, but do want to buy from a legit Sennheiser retailer. Though many DJ retailers do sell the HD 25-1 II, not many sell the Adidas ones. Any more suggestions as to where might price match and also be a reputable seller?

Also, since nearly all parts are replaceable on this headphone, would you recommend buying the protection plan (usually 2 years) with these? I've had 2 pairs of Ultrasone DJ1 (not the pro) before and glad I'd gotten the protection plans with those. While they have a good sound, the durability is not much more then a year. So would a 2 yr protection plan be worth it on the HD 25 Originals?

Thanks DJTT community for your answers.