Like the current setup I have. Motherboard is designed for gaming and one key feature for me is that it will use RAM as a cache instead of spooling to and from the hard drive all the time, 32GB of high speed memory, i7 4th gen, SSD for OS and software, HDD for files. Since change over there is NO spooling to and from the hard drive even when stitching, creating slideshows, etc. HUGE improvement in processing times for everything I do.
Using NIK software on a stitched image is almost instant to have the image ready to go compared to several minute wait on previous computer which did spool a lot of data to the disk in the process. To see what your setup is doing on Windows system open 'Task Manager' and on the performance tab you will find a lot of information as to what is going on inside. If you have a process taking a while along with use of the disk while your CPU is barely working then you know that the delay is caused by the slow read/write speed when using a disk as cache memory. If you have a graphics card working hard while the rest of your system waits on it then that might make for a good upgrade choice. Bottom line is use 'Task Manager' to see where the bottleneck is and then figure out how to fix it to improve system performance up to the level of the next bottleneck.