I'd have to agree with Andy.
Look for the newest bike you can get for the money.
You'll always end up spending more on bling and accessories, its inevitable.
I wouldn't say that a 52 reg bike with 6500 miles for £6k is a good deal at all...shop around, and don't rush into the first bike that takes your fancy. With the ever decreasing number of new bikes being registered, I'm sure a friendly dealer will want to help you walk away with a brand new bike, and you could find a cheap way to finance the extra grand needed?