It boils down to your personal preference really - do you like the new R56 Mini or would you prefer to look at other models?
Based on the fact that you did decide to buy a Mini this year, it seems to me the only logical explanation for your hesitation at this point is caused by the fear of having these technical faults occur all over again. No car is perfect and this is the risk you will have to take, but I'm sure Mini have sorted out most of their technical glitches by now.
Take up the dealer's offer of a new car - you know you want to!
