I only seen the iTouch in person but from what I have read the ZUne HD is allot nicer. But the itouch has allot more apps and games.

snapping turtles are vital to their habitat, they are predators as well as scavengers. They help keep populations of fish, frogs, small ( young ) birds, in check. they also feed on decaying matter, dead animals and vegetation Without them two possible impacts on the biome are going to occur. 1. over population- loss of a predator means prey species flourish. 2. Disease/pollution – when a prey species has no or fewer predators disease is common as the sick and weak are usually the first taken/ Over population causes excess's in fecal matter which ruin water supplies and can adversely effect other species. Also loosing a scavenger species is like loosing the trash man in your neighborhood. Waste continues to pile and becomes a hazard for everyone around.

What can and does effect their survival.
Man for one. Every few thing prey upon snapping turtles once they are past the juvenile stage. A armored shell, excellent camouflage and powerful fast strike makes the not worth the trouble or risk to attack by most things except Man. We trap them for their meat, kill them because of the misconception they will decimate a desired "game" fish population, drain their chosen habitat to make our homes or for recreational areas, people attempt to hit them with cars and boats, nesting sites are disturbed and taken.

this one is good

http://www.harmankardon.com/product_detail.aspx?Region=USA&Country=US&Language=ENG&cat=REC&prod=AVR%20146&sType=C