Have decided to carry on window shopping for my next, ultimate bike - thanks for all your comments, you've made me realise that the "wow" factor IS important to me!

Regarding wearing co-ordinated clothing - I'm quite lucky because my current bike is silver, so goes with most outfits! I will admit to having developed a sock fetish though - and these absolutely MUST go with the outfit I'm wearing!
I've had to make myself stop buying socks, because they're the first thing I gravitate to in a bike shop (less dangerous than carbon frames!) and I find myself coming over all Homer Simpson-ish, whispering "Mmmmm, socks" to myself in a drooling fashion.
My favourite are a pair of Sock Guy ones which say "Your bike sucks"!!