Where can I find product images that I can legally use?

Hi, im currently working on a start up that lists the latest technology products. Where can I find product photos (e.g. nexus s) that I can legally reuse for my site. These are options that I am aware are available to me.

Google images - use copyright filter to search copyright free photos. Quality variable.

Flickr - same as google images.

Istockphotos and Getty - doesn't have product photos

Google images - use copyrighted images that are mostly reused by other sites, with the hope that if other sites are doing then it'll be fine.