Crown brush do some amazing decent quality brushes, I particularly like the delux oval foundation brush , and the eyeshadow blending brush c443 it's identical to the mac 217 which my favourite blending brush .
For foundation and blushers I also like real techniques , they can be found in boots quite often in the 3 for 2 deals.
However my favourite brushes are Mac personally , I could nt live without the 209 and 210 for eyeliner and a 266 for brows etc . So I see them as an investment , good quality brushes will last a lifetime if taken care of , so I buy one at a time when I'm in mac .