I started a thread maybe 10 days ago about Ribble and mine finally arrived yesterday morning.
I had a mixed experience with them but now everything has arrived I'm happy that I waited (the frame i ordered was out of stock until the beginning of july).
If you ever phone them they're either engaged or sound run off their feet which I think has something to do with the shop being closed. They are quite helpful but definitely sound like they could do with more staff.
The website is also Internet Explorer compliant only so if you surf using firefox, opera, safari or any of the other browsers available you'll have problems. It's also worth double checking your order with a person in the warehouse once you've ordered - I found them easiest to contact just after lunch time.
The bike itself is great, I went for an Ultegra Carbon Sportive Racing. The quality of the frame is lovely and the rest of the components are really high quality with a great finish too. Everything arrived well packaged in a massive box - I couldn't even fit it in my pickup! All you have to do in terms of set up is straighten up the handlebars and fit your seat post and seat. If the bloody rain would let up for a minute I'd be able to tell you what it rides like! It looks good in the dining room though!
There's pros and cons to be sure but mostly with the service from ribble not the bike- they're worth a serious look though particularly if you aren't desperate for the bike by the end of the week.
Have you looked at any other similar bikes? Planet X maybe?