There is no best, but there are some things you want to look for. Computers built for gaming do well for image processing, so look for gaming machines, but with i7 or i9 processors with a base frequency in the 4Ghz range and a turbo boost around 5Ghz. Put in as much memory as you can afford, minimum 16GB. You system drive should be and SSD. I recommend 2TB and this is where you will store you smaller number of "portfolio" shots in addition to being your system drive. Put in a 2nd SSD for image processing, mine is 2TB, then a 4TB HD for raw image storage (raw images from camera to this drive). The graphics processor is critical as Adobe and Topaz can both use the processing power and memory of the graphics card to process your images. Look for a higher end card with at least 8GB GDDR6. You should be able to find a machine like this off the shelf for under $3000. I recommend talking to Dell, they will help you configure the machine of your dreams. I am not a Dell fanboy, but their warranty and service, including in home service, is pretty good, but you will want to look at an higher end warranty package.