Why a mac? You do know that AutoCAD Arch and Revit will not run on OSX? Yes AutoCAD and Revit are graphic intensive applications and require more than the Intel HD3000 video solution that the 13" MacBook Pro ($1,199) comes with. To use that laptop with Acad Arch and Revit you will need to either run Windows 7 in bootcamp or in a VM (virtual machine). That means on tops of buying the Mac you will need to buy a copy of Windows 7 and VM Fusion (if you go the VM route). To get a dedicated graphics solution in a MB Pro you need to spend $1,799 and get the 15" model. I just have to ask why a mac?
Comparable PC model:
Dell 15z - starts at $999
nVidia GF GT 525M 1GB video
It looks like an Apple with all aluminum body as well