https://www.clipstudio.net/en/purchase/
^ Right there baby. $25.
If you are looking for an art program that's like the Love child between Photoshop and SAI, this is it. This is the art program I am currently using and it is SUPER good. It has The Effects and Brushes, a thing where you can SEARCH for more brushes built in, Handy Tools, Good for both Lineart-heavy works And Painting-heavy works. Its just Good. Its all around good. It's is by far the best art program I've used in general, especially for its price.