on the face of it, it appears to be a no brainer.
the
dealers are offering ££££ discounts to shift metal and hit sales targets
You get a better, higher specced car from the SEAT range and pay out less per month for ownership.........i'd snatch their hands off.
and has had been said if your doing this via a PCP, you are guaranteed a MGFV after X years, providing you've not exceeded the mileage allowance, so the effect of the MK3 will be negligable.
by the time you come to swap it in/have option to buy out right, the MK3 will be here so could upgrade to a MK3 next time fairly easilly.