An MGF as a second car with a Peter Best 'Abingdon' policy means it's cheap to insure and you can use all your No Claims Discount on the MG ZR. Sounds like a no brainer. You'll know exactly what to look out for this time and might not get stuck with a green one this time - you can get a Tahiti Blue one They look quite good with stripes too
Personally I would be on the look out for a white F and put the Vintage Racing stripes on it. I too prefer the look of the F.
Good luck in your search, if you find one near me, give me a shout and I'll go and give it a once over for you
PS his name may be MGF MARK but his choice in cars is .... how can I put this.....questionable your plan sounds much better.