Some nice bikes on here
I would reccommend looking at the big 3, specialized, trek & giant. They all offer good value and it's then down to rider preference. Giant frames are sized weird so make sure you try before you buy. Don't write off boardmans available at ahem...halfords, they offer really good vfm and win a lot of bike tests in road cycling mags.
Im trying to up my road cycling this year, did lands end to john o groats over 7 days last September & my backside still recovering!