Yes, the 1.6a is the best deal for performance right now. The 1.8a costs about $50 US more so I would stick with the 1.6a cause you can get 2.4 out of the 1.6a alot of times. The 1.6a overclocks higher in most respects than the 1.8a from the word from people, but that just might be because that most have the cheaper cpu.