+1 for what Globalti says, Wiggles DHB brand are very good value, I have a pair of their flash light reflective bib tights that are warm & comfy, also have a look at Castelli cafe in the sale section and the same on Santini's web site for top notch discounted kit, you mention about them being comfy for only 3 hours, this wouldn't be the tosh that
Decathlon write on their product descriptions would it, as for bib shorts I've also got the Pro series from Aldi & they've been very good value for money, & comfy too.
Also PaulSB makes a good point about buying unpadded & wearing them over bib shorts