To be honest, I don't know where to start...
Nanshy has won my heart with their luxurious, non-shedding, easy to clean, cruelty-free, vegan, PETA approved and super soft bristled brushes! Nanshy.com offers great quality brushes and tools for everyone at a great price point.

The brush set I have is The Eye Brush Set in 'Onyx Black'. It retails for £24.96 and comes with 7 essential eye brushes.
The set includes:
x1 Large Shader brush - Great for shading and packing on lid colour.
x1 Eye Crease brush - Applies and blends shadow seamlessly.
x1 Tapered Crease brush - Blends shadow softly into crease effortlessly.
x1 Blending Eyeshadow brush - Applies shadow smoothly and makes pigment stronger.
x1 Flat Definer brush - Great for smoking out the shadow on lower lash line.
x1 Precise Bent Eyeliner brush - To achieve a flawless feline flick.
x1 Angeled Detailer brush - I use this to clean up around my brows, it'd also be great to fill them in.