Almost 5 years i am researching ecommerce (estores) websites, i am tiring to find best , but non of them have complete functionality, some have good design but poor functions or usability, some are full of various functions, but with bad design or usability...in this group i would like to share best of all design, usability and functionality concept estores, here are some of the interesting estores:

http://www.makeup.com works on http://www.elasticpath.com/ best ecommerce solution, but too expensive from $25 000 – $70 000 , also its demo shop has good design and functionality, almost the same as Magento
http://www.amazon.com/ best known estore. Good design, best functionality, but not best usability.
http://www.dell.com one of the best.
http://www.laskys.com one of the first with one page checkout. Not the best design and usability, but with some good functions.
http://www.florsheim.com/shop-fl/index.ep interesting shop.
http://www.suitcase.com/ one more interesting store.