Although I'm probably only a week ahead of you,
the thread that resulting in my RT-58 is a little further down this page. Unfortunately, you will also note that I got an RT-58 including the SRAM Rival 22 group set for £500 two weekends back. I'd apologize, but I'm feeling too smug!
One thing to note is that the photos can be a little generic. The bike you have linked to has the Campag Khamsin wheels (Fulcrum Racing 7 clones, I'm told) and not what is pictured. The saddle will be a the black version of the Prologo I have, so you should look at my pics (page 6) and Google the actual spec to visualize what you are actually getting, because the build list is accurate.
I'm a bit (!) tubby and the saddle sunk a centimetre during it's maiden voyage. Upon readjusting and tightening more aggressively, the seat stem clamp bolt snapped and I'm actually a mechanically sympathetic type. I don't know your weight or height, but I don't think it should have done that at the force I was applying. If your build hasn't started, I'd spend the £2-3 on upgrading it. Quality wise, everything else seems bang on for the money.
Fit wise, I'm 5' 10" with a 32" inside leg and fairly long arms. I would, in retrospect have gone for the 100mm steering stem, rather than the 120mm item, but that's more about gut clearance than reach!
Otherwise, I fuggin love it and simply being on a P-X seems to create conversation within the two groups I now ridewith, which are populated by the nice, but predictable Specialized/Cannondale/Giant me-toos.
Russell