I have a 2006 Roubaix Comp which I bought at the end of last year, at serious discount because it was end-of-year and ex-demo, but completely unmarked.
It's a bit of a 'bitsa', made-up of whatever the bike shop had lying around, I think
- Roubaix Comp frame, full Ultegra gruppo, Fulcrum Race 5 wheels, Cinelli Axis bars, Pinarello MOST stem, S-Works Pave seatpost
It also had Conti GP4Season tyres, but I replaced them because they had the most atrocious wet-weather grip and have put Michelin ProRace2 on - black and red frame, black wheels with red decals, red and black tyres : all looks a bit bling now !
I've also read that the OEM bars are a bit flexy but can't comment - my Cinelli's certainly aren't.
Out-of-the-box it comes with a couple of thick spacers under the stem and a big conical thing, but the bike shop had removed them and cut the stem down, so even though it has a relatively-long headtube the front end of mine isn't anything like as over-high as all the magazine reviews complain of.
I moved-up from a Spesh Allez and find the overall ride fairly similar - predictable and stable.
I got the tape measure out and adjusted all the dimensions the same, now swap between the two bikes - Roubaix for 'best' and sportives, Allez for winter/wet-weather/light-commuting.
On going back to the Allez, I notice just how much smoother and nicer the Roubaix is - not only is there far less vibration and kick from the back end over bumps, but everything seems to operate so much more smoothly too.