I use spendy tubes and tires on my race wheels - turbo cottons on my road bike, corsa speed TT bike, both with latex. On my daily driver (Giant TCR) I don't bother and go with butyl tubes and mid range tires, whatever is on sale.
If you don't have dedicated wheels for go-fast time and want to splurge on some every-day type speed, I'd say go for it. It's the most cost-effective speed upgrade one can buy and it does make quite a big difference. Plus the ride feel of a latex tube and supple tire is very nice which makes it enjoyable.
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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste