I wish people would stop stereotyping all 'budget' tyres as lethal, dangerous, poor performing rubbish.
Whilst I'd be the first to claim that you only get what you pay for; the performance of some less espensive (non runflat) tyres is equal to and in some cases actually better than some of the big brand 'premium' (expensive) tyres!
If you want advice on purchasing the best value non-runflat tyres for your MINI I'd listen to the experience of people who have actually fitted and run their cars on particular brands and specifications of tyre. This forum is a great place to get this kind of information.
Personally I have found that Kuhmo Ecsta non-runflat tyres are performing well on my MCS JCW
's and they have better test performance results than some of the premium brand tyres that cost upwards of £50 extra per tyre. The only quality that seems to be inferior to the more expensive tyres is wear rates.
The Kuhmo's are highly recommended by my local independant tyre specialists and they are fitting them onto lots of Golf R32's, BMW M3's, Audi S3's etc.