Hello there!
Well I haven't mentioned it anywhere so no need to apologize
I'm actually using a gaming PC (these big chunky things) for all of my working stuff LOL. Mainly because it has a lot of RAM and it works well enough.
Here are some off the specs:
Windows 7 professional
Processor: Intel(R) Core(TM) i5-3450 CPU @ 3.10 GHz
8,00 GB RAM
64 Bit Operation System
I heard from a lot of people that a Mac is really useful when it comes down to digital drawing. Since I'm a Windows person I can't really tell, but maybe you have a chance somewhere to test it out yourself.
I hope I could help you a little