I have no experience with AMD, only with Intel.

My current desktop PC runs i7 8700k processor with 48 GB RAM and a 512 GB M2 SSD, where all my TMs and TBs are stored. This system is still fast enough. I will be upgrading my PC next year and my next one will again have the best possible processor at the time (most probably i7 again), at least 16 GB of RAM and M2 SSD, at least 512 GB.

My laptop is the MS Surface Pro LTE with i5 and only 8 GB RAM. While RAM is not that big problem, the very small SSD with 256 GB is. It is noticeably slower than my desktop. Due to the nature of mobile CPUs and i5 is the least what one should chose. This device will be replaced this year, most probably by a MS Surface Pro 7+ with i7, 16 GB RAM and 512 GB SSD.

Studio does not utilize multi-core, but the whole system does. So definitely your processor should be multi-core. When you go for AMD, check the performance specs, these should equal or top an Intel i5.

Thank you, Jerzy for your reply.

Of course, I consider cost performance, too.

I think I will select from AMD Ryzen family, and I will wait for other advises now.

I would like to know what kind of benchmark value I should check and compare with the price of the CPU？ 

To start up quickly and retrieve quickly.

Can anyone advise me？

PassMark - CPU Comparison (cpubenchmark.net)

CPU UserBenchmarks - 1276 Processors Compared

PassMark CPU Value Chart - Performance / Price of available CPUs (cpubenchmark.net)

Thanks Jerzy,

These are useful sites for me.

Teruki