Thanks to everyone for letting me get things off my chest!
Have now been fully refunded and waved goodbye to my baby yesterday - the LBS are sending it back to Litespeed.
I'm currently now mulling over all the different specs of the different models. Thinking about the Specialized Allez Elite (taking one for a test drive, as soon as the right frame size comes in) ... though would really love the Allez Comp for the Ultegra groupset, but my budget won't stretch to that, I'm afraid.
Likewise the Pinarello, MM - would love to give them a whirl, but out of my league, I suspect! Only have £1000 to spend, which doesn't buy much over here!