What do you ride at the moment?
I guess you'll be looking at carbon? Maybe something like a Cannondale Supersix, Giant TCR, Trek Madone or a Specialized Tarmac for racing. Then you've got the options from Cube, Focus,
Ribble, Boardman
Get to a shop. I'd go to a few LBS and look at the options they have. Thing is for the longer rides, you may want a more relaxed sportive geometry for the shorter races a more aggressive bum in the air geometry. Whatever you get, it needs to fit you properly