Hello - I am familiar with the system requirements for AutoCAD for Mac and have been running on a MacBookPro with 2.3 GhZ i7 64 bit and 16 GB RAM for a year or so. 

I am wondering if I can expect significantly BETTER performance on a desktop Mac Pro?

The biggest software problem I run into is: crashing and/or significant delays when editing blocks after prolonged program use.  

Is that a software issue or an issue that can be resolved by buying a more powerful machine? I seem to have no other functionality problems on my MacBookPro other than not being able to run multiple graphic programs at once.

Also: Would I be better off just buying a workstation PC and working on PC Autodesk?

Thanks for your help!