As per my understanding, new model Toyota Altis will be launched with 1.8 engine in june 2014 and after that GLi 1.6 engine AT and MT along with XLi 1.3 engine will be launched in Sept 2014. Prices will be 2 lakh more in XLi variant than the current XLi since it will be 1.3. GLi however will be 1.6 with no 1.3 option so price difference might go up by 4 lakh than current GLi and Altis will be 25 lakh.
I actually bought toyota corolla GLi in 2008 April for 9,99,000 and in Sept 2008 the new corolla GLi was launched with 14,00,000 price. I sold that car for 12,30,000 in Feb 2011 with 38,000KM.
So basically since this most probably would be last 1.3 GLi and the new version is going to be expensive i think you should go for the car however getting a Limited Edition is totally your personal choice.