Even the nicer AF lenses (which yours definately is) do not seem to focus manually as well as the MF lenses. I guess if compatability with AF is an issue, you may want to go with the AF lenses, but I would probably be looking MF and wait until I really want an AF body to go that route. I guess the issue might be, just how likely are you to buy an AF body soon? I also agree with Suzanne about primes, they are less convenient, but you get better speed, often much better, and lower cost.