RoadWimp,
I work at a Specialized dealer. Generally speaking, I am not a fan of many of the major bicycle manufacturers. However, and I'm not just playing salesperson here, Specialized has a good reputation and, IMHO, the deserve it.
The Allez is a good bike and if the price you've been quoted is not for an older model or a scratch and dent bike, it's a very nice price. (A 2006 model would cost you $710 before tax at my shop in Washington DC and is Specialized's MSRP)
The real question is: Is the Allez a good bike for the type of riding you'll primarily be doing?
-How often and how far do you ride?
-Will you be commuting on the bike?
-Will you be riding two, three or four seasons a year?
-Will you be doing loaded touring?
-Do you have a preference between aluminium and steel?
The contemporary Allez has an alluminum frame with braze-ons for a rear rack, a carbon fiber fork and seat post, Sora STI levers, a Sora FD and a Tiagra RD.
The next step up, the Allez Sport, also available in a triple, has the same aluminum frame, carbon post and fork, and rack braze-ons but comes with the upgrade of Tiagra STI levers, Tiagra FD, a 105 RD, a slightly stronger wheel set and few other items. There is also a jump in price but the higher grade component set may last you longer, and serve you better, on the long haul.
Personally, I do not recommend the Brava, and have been increasingly disappointed by Binachi over the years, particularly in the area of quailiy control. Having said that, if you are interested in options from Bianchi, check out the Volpe. Again, there is a price increase from the Brava but there is also a significant quality increase within the component spec as well as this bike simply being better suited for touring abve and beyond straight road riding.
As always I'll mention that there's no substitute for a visit to the nearest LBS, a talk with a good sales person who will give you the time you deserve, and some test riding.
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i'd rather be biking.