Hi I just bought zt180 with 512 mb ram from china but i am not quite pleased with the battery and the touch screen on it. The battery i think is to bad and on the touch screen is very difficul to use (compared to my iphone which i have used last 2 years). I saw that there different tablet pc models in china, there these zt180 models which are cheapest ones and there is another model which are with the cortex a8 cpu who 100 dollars more expensive and there n450 atom window 7 tablet pc'es which 150 dollars more expensive. There are all with 10 inch screen. Does anybody now how these 3 machines are compered to each other, i am thinking more about how the display is and the battery? Which one these 3 models are closest to an ipad? The n450 and coretex a8 is with the multi touch screens is this the same as the display on the ipad?