which is best for games & watching movies on long journey's

Hi im after a new ppc,my e570 is a battery drainer and was considering the E740 but the way toshiba have served there customers they can stick it, anyway along the lines of battery life i have been looking at the Dell axim x5 or asus 620,does anyone have any thoughts on these two especially the dell as it looks tempting.or can anyone recommend a ppc in the similar price bracket