I love those black and white Ridleys!
Note that the Tiagra bike, while I'm sure it's fine, has the old-style shifters where the shift cable comes out the side of the shifter body rather than under the bar wrap. This has advantages and disadvantages - it's less finicky to set up (less reliant on exact cable tension), shifts smoother, allows downshifting more gears in the back, but doesn't look as nice and clean (to most people). Some people also actually like having the cables out in front because it lets them rest fingers there. Anyway, just something to be aware of; it either is or is practically the same as last year's 105, and is 10-speed, so it's not like it's mechanically unsound.