Thanks for all the advice so far. I don't expect just to hand the car back at the end of the 2 years, I will either look to sell it privately or trade it in for something else. I'd say a private sale would be more likely, I'm hoping to make a little profit on the £9300 GFV. I'd be looking to sell for £10000-£10500 at the end of the 2 years.
I wouldn't be financing the recaros, I'd pay for them upfront with my deposit (as I have done all my other options).
The other issue was the poor build quality of the previous 197 recaros. On the renaultsport forum people have suggested they had theirs replaced with no problems whatsoever under warranty, one guy had his replaced in his Clio 200 and another had 5 sets in a 197! Hassle yes, but at least I have peace of mind that if they do wear then Renault should acknowledge it and replace them under warranty.