For those of you who use bibs these are really good shorts. TBH they are a bargain at full price anyway!

The 700 aero fit are the ones to go for

You can have free delivery or collect in store.

Whats the fit like?

Normal UK sizing rather than 'italian' similar to gore I'd say

Only shorts, not 3/4s / knicks. Dammit.

Having been in store for a touch of them, I can't see a difference in materials/cut between the 520 and 700 models aside from the shape of the braces. Go for either over the inferior 500

Got some of the 700 version as IanF's recommendation and used them for the first time tonight and for the short ride I had, I must say they seem very good.
Braces are a bit thin and fiddly but the chamois was very comfortable.

Still to do a longer ride in them but they should be great.

Just put a few 3 hour rides in and a full 8 hour ride wearing mine and they are fantastic so far, I found my endura bibs just as comfy on most rides, but useless on anything over 6 hours in the saddle, which these appear to have have solved

Aside from the chamois, the biggest difference was the extra wide flat bands around the thigh, with a perforated silicone which completely eliminates a previous hotspot.
Mine are now used for both road rides and XC, I've yet to be disappointed by anything btwin, I've got the jersey to match too

I rotated two pairs on the Borders 350 last weekend. Or 365km of it to wooler anyway...

I am left with a slight saddle sore on either side, but did ride for 40 hours over 2 1/2 days. That's about three weeks worth of riding in a weekend!