Exilink :
So I HAVE to get a MAC laptop for my school. I never bought a mac before so I don't really know what is good
Should I get the macbook air or pro? I already have a PC laptop thats good as the 15" macbook pro...
so I don't need a good macbook pro to bring to school. and I think macbook air 13" is good for bringing to
school for lightness and slimness. But I don't know...Should I get the 13" macbook pro instead?
And when will the new macbook air or pro coming out? I need to get the laptop before July of next year...
should I wait?
Based on my experience, and I've used the 2011, 11" and 13" MacBook Airs (MBA) as well as the 2011 13" MacBook Pro (MBP) I'd say the a 13" unit would likely meet your needs for all-around computing. However, when you say "
...need a Mac for school". What will you be doing with it and how long does it have to last you...and what's your budget?
Without knowing these details its easy to recommend the 13" 2.7Ghz i7 MacBook Pro as an all-around machine based on cost, power, portability, and longevity. I infer that you're using one of the fewer and fewer tools that's only available for OS X which is why a Mac has been specified? As long as only light gaming (or no gaming) is part of your criteria this machine will likely do you well for a long time. A recommended upgrade is a 7200 rpm drive (or hybrid or SSD (if possible)).
Now, a 13" MacBook Air is nice machine, is fast, has a great screen resolution (with a ppi count that makes it incrediby sharp) and is quite light, but if that that few pound saving over a 13" MacBook Pro is not paramount and you're not trying to impress your campus-mates with slick thin-ness of the MacBook Air, I'd say the 13" MacBook Pro recommended above is your best bet...and its a very fast machine for general use and lighter multi-tasking/threading use. It's a great compromise between power and portability.
Lastly, a MacBook Pro gives you the option to replace the optical drive with a second hard drive if desired. Something you may find quite useful over the life of your computer.
EDIT: In response to the noise MacBook Pro noise noted above:
When the CPU in the MacBook Pro does finally spin up (both cores are continually and FULLY stressed for an extended period of time (which, IME, is uncommon), the noise increases gradually. Though it is quite noticable, I don't find it irritating as it sounds, as noted, like a jet turbine slowly spinning up. I always think this sounds cool, but this is purely subjective. The MacBook Air's cooler will spin up under the same circustances and generally sounds the same while doing so.
I would not really consider this unless you know you plan to be stressing the laptop's CPUs fully and for an extended period of time for the majority of its use. Both machines are generally very quiet, in my experience.