Which computer for LOGIC PRO/STUDIO

I am on current version of Logic Pro and running a 2008 MacPRo Intel Xeon,

a) 3GHz CPU speed

b) 2 processors

c) 4 cores per processor=8 cores altogether

TIme for a new computer, Any advice please:-

1) What's the most important of the 3 factors

a) CPU Speed

b) number of processors

c) number of cores

2) Main system drive choices:
a) Have you found using a SSDrive a big difference in performance cf a normal 3.5 7200rpm drive.

b) any experience anyone in terms of using a 10000rpm drive or an enterprise drive?

3) Any thoughts of the sweet spot for RAM

a) 16G or more (is the significant price difference worth it?

b) 3rd party brands recommendations vs apple RAM from Store?

Thanks for any thoughts.

ST

syd@sydjaz.com