The OP really needs to think about what he wants from a bike, and what he is likely to want in five years and buy based on that... So many great bikes available at that budget.
Personally If I was looking to keep a bike for five years with a budget like the OP I would be looking at titanium just because its classy and timeless.. I bet the Venge will age in a less dignified manner.
I agree. With this kind of budget, you shouldn't buy a bike because of 'shape and styling'. No decent bike shop would try and sell you one or other of these bikes on that basis. If you really want a super-stiff aero racer, go for it, but your posts suggest you don't. Comfort is far more important than aerodynamics for the vast majority of riders. And if it beats you up every time you ride it, you won't ride it....Of the mass-market manufacturers offers, something like a Roubaix or a Domane is more likely to suit. And then there's the Cervelo R-series bikes, the Colnago C59....Don't rule out other materials either: plenty of very high quality options in steel and titanium.
But if it was my money, I'd be looking at made-to-measure. If something 'off the peg' like a Specialized or a Bianchi, suits you, is the right colour...fine. However, you could have something
built to fit you, for the same money.
Legend made-to-measure carbon bikes start at £2000 (they also build bikes for Comtat). £4,200 will get you custom tubing as well (so the ride can be tuned to your requirements). They build in steel and titanium as well. Parlee amongst others also do custom carbon, and plenty of other firms do steel/titanium full custom.