A little help with purchasing

Ok, so I'm heading back to school next week and i have an old sony cybershot p7...its small but kidna bulky and i really wanna get something that fits into my pockets easly (espceialy jeans). What im looking for is something thats nice looking, gets a decent shot ( im not printing anything) and is really no thicker than a wallet and no bigger than a pack of gum. from my "research" i like the Casio z500 and Casio ex750...i need to take decent artst shots for a photo class too, but i dont need to set anything specail...any help? if the z500 takes decent enough shots and if the lcd doesnt get hard to see with sunlight id rather go with that cus its 100 dollars cheaper and is thinner..anyways apreciate any input