I'd say wait and see what the Hornby one is like.
From what I have heard the Dapol one isn't that brilliant. The Pantograph is just a fixed-position molded piece and isn't a good representation of the complicated pantograph!
I haven't seen one in the flesh as of yet but there ya go.
I'd say wait for Hornby's Pendolino, their standards of quality in the models are ever increasing. Dapol's Pendolino in general is a nice set but lacks detail, both the pantograph and the bogies needed improvement which i think Hornby will achieve.
The 5 car set does indeed however they are not stocked any longer, but from what ive seen the tilt is very good and you dont get better quality than that in a model. Reason being was that Bachmann was loaned the CAD designs used used by Bombardier’s plants in Brugge, Crespin, France and Wakefield, England.
Oops i tell a lie! Before being sprayed by the network rail cleaner, i went down to my local model shop today and Bachmann's tilting Super Voyagers are still in stock. They also said that Hornby's Pendolino should come out early next year.