I love the Sag but I don't normally like cars pretending to be something they're not, all those Ferrari MR2's spring to mind! However, taking a TVR Tuscan and converting it to a Convertible Sagaris actually seems to have resulted in a rather nice motor, a little expensive maybe considering a '04 Tuscan with 9k miles is probably worth about £20k but I suppose all those Sag panels and work possibly make it about the right price:
http://www.autotrade...age/1?logcode=p
BTW, wish I'd bought a Sag instead of the Z now, they were about £40k 3 years ago and now they're all about £50k.