So after banging on about how lovely Scott bikes are, you got a GT. Nice :P
Well a £500 should be pretty good, and a nice build too, and seeing as its £100 off, even better.
Also, show models are usually built properly to show them off and make them more desirable, rather than slight half-assed jobs round the back of the shop, and any small dings or scratches that are there now, you'll just add to them in 6 months and it won't make a slight bit of difference. In fact, less paint = lighter = faster!