No Kev.
Not knocking peoples opinions, but you CANNOT build a car to that spec for the money it's for sale for. Yes you could buy an RS500 and mod it for that money, but have the people saying that ever actually DRIVEN a Cossie converted Escort?
I doubt it. I've driven every Cosworth model going, with anything up to 520bhp... and nothing compares to the buzz, driving sensation, sensation of speed and character that even my lowly stage 3 Cossie'd Mk2 Escort gave me. So not only is Kevs Escort more fun (IMO), but it's quicker than any RS500 I've ever heard of.
Ben