Which computer should i buy....?

well the core i5 is faster and better than the core i3 in all respects ... if you are not a programmer , designer or any such person and donot do alot of multitasking then core i5 would be better as RAM mainly counts when you have to do alot of multitasking or run heavy programs such as photoshop or any such thing ... and besides these days 2 GB is enough for most computers which are for general use ... and if you install a 32 bit operating system then atmost 3.5 GB of RAM will be recognized by your PC ... Hence , 500 MB will be totally wasted ...