Buying kindles or looking for kindles then you need an advice for this but most go for a new models that can even better than old models as people believe.Coming to this new kindle was for less price and 6 inches display that can be easily read from distance just like with our laptops.
Theirs a huge difference between kindle and backlit lcds since you cannot able to read in backlit screens but you can read in kindles under sunlight just look in the image below.

The kindle features are as follows
Very high contrast and e link screen more than 50% better with latest pearl technology.you can read in even under red sunlight.better font size and improved from old kindles in this new edition so it can be viewable from far too.Its good for our eyes.A single recharge can give you upto 2 months of life cycle this means better than laptops or mobiles.This is very leek in design and thin featured weighs around 8.5 ounces.
This is built in wifi enabled series and can be easily download anything without wires.Browse the web over using the wi fi method.20% faster page turns with seamless reading.
comparing to laptops this kindle never heats up and lighter in weight sleek in design much more user friendly,Energy can be used for days even months in one recycle charge