Just so you get an idea, this was mine last year on 16" Imolas. The main reason I went for 16's was because they were cheaper and so are tyres. I'm also looking for a set of OEM 17's due to a possible brake upgrade in the future.
They will be eventually but probably not this winter just because I'm also saving for a holiday in Florida in march so having to do little bits at a time. Would would you be needing them just out of interest?