Best geared road bike, under £650

Bianchi do cheap builds of their mid range framesets.

i tried one of these bianchis today http://www.evanscycles.com/products/bianchi/nirone-7-sora-2009-road-bike-ec016954
it was a complete blast to ride, but it only comes with sora componants for my price range, and i have no idea what the quality of the prowheel compact chainset is. loved the ride of it, best of the bikes ive ridden.

Yeah! well done me.
only kidding ;)

The first rule of bicycle purchase is to buy the best (including fit) frame you can get your hands on.
The second is to either buy one with nice wheels or upgrade the wheels.
After this you can upgrade the components bit by bit, preferably as they need replacing.
The only problem here is that starting from a 9 -speed means you may have to change several components at once to convert to higher end 10- speed groupsets (The complete 105 groupset is currently £400, http://www.merlincycles.co.uk/?fn=product&productId=1180)

The Nirone gets some of the best reviews for aluminium framesets, and looks great to boot.
Gets my vote.