Any question answered...

Well if you check the WW rims listings page you can compare weights.

OP's are around 430g a rim - which is a good weight for a clincher rim when you look at the rest. I think there are now some light weight cx rims which would be good as they're wider - not sure what their availability in the UK is tho. Velocity A23's are wider and a 'normal' road rim weight. But bang for the buck and in terms of their availability, OP's are one of the best options.

Hub weight is less important, as they're in the middle.

From memory Mdcctester often recommends rigidas(?), as they're cheaper and just as good in his opinion.

From my limited experience and the more I read, I think that for the average cyclist, any half decent 32 hole rim, built 3 cross, to a reasonable standard, with a tyre that isn't shit will do the job well 99% of the time. Further, I think that anything beyond that mainly comes down to pure bike geekery*.

EDIT: also see this thread: http://www.lfgss.com/thread41982.html

*my next set of wheels will definitely be one of these useless constructions.

If you can find a good deal get some DT swiss rims. They seem bombproof, really stiff.

105 hubs will be fine, just as most shimano ones would be. Id suggest that you get 36h at least on the rear if you are normal sized bloke. I realise that 32h and even 28h can be perfectly durable on workhorse bikes. But 36h is even more!

A good quality rim, tensioned well with 36 spokes never seems to go out of true. I had a major vehicle impact to the rear and my DT wheel was still perfect afterwards.

I had a front impact where a car reversed over my wheel (rim got jammed under car bumper). The whole weight off the car pinned my rim onto the ground, seemingly bending/crushing it. But after the car got off, it sprung back straight. Only a little 6mm notch where rim was crushed into ground. It was a old Campag omega V 36h. Been riding it since (july) when it happened without fixing it. Perfectly solid.

The extra 4 spokes makes a big difference in my opinion as Ive not had this luck with my 32h wheels.

Thanks guys, 36h seems like the way to go as well. Should be strong enough for audax but light enough for training/ club riding.