depends how well you know the dealer and what sort of warranty they are offering.....
we know that strike's car (previously big dunc's) has been well looked after and there is 3 years of history of the car on this site.......
sat nav is the top head unit and looks lovely but not sure on how it performs as a satnav - i'd still use tomtom or a phone app for nav.
the sounds system on the BRAB is superb any way and you should have the 7 speaker system (2 front, 2 rear, 2 tweeters in door a pillars and 1 sub under passenger seat)
are you after silver or black??
JJ