-
I bought a pair of the Decathlon bibs off the back of this suggestion, first ride in them today and they seem great so far! Seemingly great quality for the price. I went for a small (usually either small or medium but they were out of medium in black) and they're spot on for me, tight but in a compression-y way rather than a restrictive or uncomfortable way. They look pretty decent as well.
For comfort I prefer my Decathlon RC500 bibs to my Rapha Classic bibs.
I think there was something like a £140 difference in price.
Size small in both - Decathlon are tighter/more-compressive.