I got some pucker expensive ones from John Lewis with housewarming vouchers family gave me (I never would have stumped up so much for them without the vouchers). It’s not exaggerating to say they changed my life!
I’ll never skimp on pillows again (or a mattress or bed linen).
As far as I’m concerned the feeling after a good night’s sleep has to be one of the best, plus the extra amount if stuff I can do when I’ve slept well compared to when I’ve slept badly means I can justifiably see anything like that as ‘an investment in my personal productivity’ 🤣
Spend the money. Sleep well.