What bib shorts?

[dirty boy]

My long ride is coming up shortly, training has gone well (or not) but i've got 400 miles in 4 days in a couple of weeks and just realised I only have one pair of cycling shorts and one set of long ones.

I could do with a bib short I think, as I hear they're a bit more comfortable on longer runs.

Budget is about £50, but really do fancy some decent padding!!!!

Any tips welcome.

[dirty boy]

Thanks for the responses

Seen these http://www.wiggle.co.uk/dhb-vaeon-roubaix-pro-padd... which seem reasonable value and state for rides over 3 hours.

Really can't justify the Assos at £130 upwards, I only do 30+ miles a dozen times a year.