Hi guys, I am looking into buying an 11" MacBook Air and was wondering if it really makes a difference to pick a 1.8GHz Dual-Core Intel Core i7 processor over the 1.6 i5? I am getting the educational discount so getting the 1.8 would cost me $135. Given that my usage doesn't really beyond listening to music, watching a few movies, surfing the web and using a little word and powerpoint, what would you guys pick if you were in my shoes? Also planning on getting 128GB which in my opinion is plenty of space for what I do. Thanks in advance for your input!