It's something of a lifelong quest of mine. I've done what feels like every option regarding brand, filling, price, all with varying degrees of unsuccessfulness.
I'm a pillow hugger so my pillows are never flat on the bed, but sort of scrunched up IYSWIM? I thought I'd finally cracked it with a mid priced Ikea one, but that has now also succumbed to my wicked ways and is a lumpy excuse for a pillow.
By contrast, DH is still using a couple of bog standard ones from Sainsbury's that he's had for at least 18 months and that, with a quick shake, come up as good as new.
As far as price goes I'm wary of spending too much, in case I murder that one as well. OTOH I acknowledge that I may have to bite the bullet here in order to achieve my hearts desire 