Which to buy? iPad 4 (also known simply as 'iPad with Retina display'), iPad 2, iPad mini? Or hold out for the iPad mini 2 or the iPad 5? Here we help you decide on your next Apple tablet.Related StoriesApple's low-cost iPhone could outsell iPhone 5S in 2014, says analystApple iPhone 5C to smash sales through the roofiPhone's share of smartphone market drops to 13%
