eggcatcher said:
Id go 15", but thats for performance reasons, as bigger rims = higher speed but less acceleration, smaller rims = better acceleration but lower top speed. I plan to lower it at some point, and I don't think 15s look that small, won't go smaller though.
As long as you use the correct thinner profile tyres on larger wheels though mate, it keeps the overall wheel size pretty much the same, plus the speedo still reads correctly ............
I'd go for 17's norbs, as said they fill the arches better (would rather see metal than rubber personally!

)
18's look awesome but you will more than likely experience some 'rubbing', especially if you intend lowering it in the future.