One of the salesmen in Digital Mall told me that this model is being upgraded by Acer and it is predicted that the 4830TG will come with better i5 and GT555M in 2 months. Not sure if it's really true.

and fyi, this model is not available in most of the IT stores... probably for the next 2 months. 

gt555m? that wud simply worsen the heat issue
nvidia's next gpu i think will b intro duce very late of 2011 or early 2012, n da mobile version wud b months aftr dat. so...might as well just wait for ivy bridge