What are you doing with it? are you going to be doing cpu intensive tasks? is battery life a concern? I'd need more information before suggesting something.
Echoing SSKs concerns, adding, why SNB?
For tasks not including games, the difference between SNB and previous setups is typically imperceptible on the desktop, particularly with anything approaching a decent SSD. Enough cores and enough memory, whether AMD or Intel, and it's very doubtful you'd be able to tell the difference, unless of course you have something that is computationally intensive as SSK mentioned.
Additionally, what screen resolution and quality preferences do you have, and what input devices do you prefer? Do you want a full 10-key?