ginge mate, as much as i'd love to see your cabriolet done (as it will be very quick) i think its in your best interests to get a different car.
i think you should seriously consider a sierra...
saph cos if you can afford it (remmbering it might break) or an XR4x4 if you cant afford the car but still want something that does 0-60 in less than 10secs. i wouldnt go XR4i as it will be a money pit.
i think you'd really like an XR4x4 twin turbo, but again, if it breaks, youre fucked... proper money pits!