Husqvarna T425 (but it's top handle - also not good for bad wrists).
Makita DCS230T (also top handle)
10 inch bars here to retrofit: -
http://www.clarkforest.com/shop/chainsaw/10-inch-chainsaw-bars
http://www.clarkforest.com/shop/chainsaw/10-inch-chainsaw-bars
Or there are battery electric ones.

Echo CS271T at 6.6 lb claims to be the lightest available in the USA - but it's 12 inch and top handle

Which brings me to

" 10 Hottest chicks with chainsaws"

Here
http://uberhumor.com/10-hottest-chicks-with-chainsaws/

http://uberhumor.com/10-hottest-chicks-with-chainsaws/