I have a iMac (24-inch Mid 2007) that I bought in November of 2007. It came with 1 gigabyte of ram. I later upgraded it by adding 2 gigabyte of additional ram for a total of 3. I am running Lion and my old iMac can be very slow sometimes. I really want to replace it, but I am holding out for a new or updated model. I am wondering if it is worth $37 to replace the original 1 gigabyte ram with a generic 2 gigabyte ram from Crucial? I understand that going from 3gb to 4gb isn't going to make a whole lot of difference, but does anyone think it would be significant?