Without looking up the specs on the various bikes which you have listed, 'I' would choose the
Bianchi ... just because it's a Bianchi!?!
BUT, presuming the Bianchi & Specialized are similar to the Trek Madone, then you may want to consider that the tyre size may be limited to 700x28, or smaller, on the Road bikes which you are considering ... and, many Carbon Fibre Road forks cannot handle anything larger than a 700x25 tyre.
Is THAT a possible consideration?
Will you ever want to mount mud guards?
FWIW. Changing from FLAT to DROP handlebars (a
nd eventually, narrower tyres) may be the change which will actually satisfy your need for a new bike ...
Regardless, you can put DROP handlebars on almost any bike (
recumbents may be the only exception).
Without seeing your
Boardman, I would say that a few small changes can transform it into the bike which will better suit your needs for the next riding season, or two ...
- a rigid fork will be beneficial if your bike currently has an inexpensive suspension fork.
- I recommend Campagnolo shifters because they can be readily made to be compatible with a variety of Shimano drivetrains ... that translates as less money out of your bank account. I also think that Camapgnolo shifters happen to work better, BTW.
Without knowing what your
Boardman looks like, here are two examples of bike frames which would normally have been outfitted with FLAT handlebars ...
The first began life as a MONGOOSE Hybrid ...
The Hybrid
build is currently incomplete -- It needs cables + housing AND I'm planning to move the particular CX fork (
no eyelets & limited tyre clearance) to a different frame because I want to be able to use any size tyre from 700x19 up to the 700x52 which the frame can already handle and which a different fork will be able to handle ... I'll probably use some MINI V-Brakes instead of cantilever calipers.
A Hybrid frame with a Rigid fork + Drop handlebars is essentially what a TOURING bike was 30+ years ago -- a good option for most of us, IMO..
And, the following began life as a MONGOOSE Hardtail (26er)
The wheels are 700c. I needed to lace a 700c rim onto a MTB hub.
The width of the chainstays meant that if I wanted to use a Road crank that I would need to use a BB which would normally be used for a Triple otherwise the 52t chainring would not clear the chainstay. Most recently, I've opted to go with a MegaExo crank -- it is a Triple
sans Granny (
at least, initially).
The forward opening of the theoretical fender mounting hole was enlarged to accept a recessed nut. The brake calipers are Tektro LONG REACH which happen to work with the particular Carbon Fibre front fork, too.
If you are a wise shopper & can DIY then YOU can easily convert your Boardman to something similar to the two bikes you see pictured above for LESS THAN
£200, possibly a lot less than that.