Help please

I'm buying my 200 soon, but to help with my search I was going to buy wheels desperately as I have been waiting ages for a nice one with speed lines so I've Seen some wheels for sale and in the description it has "Speedline Turini Flowformed Motorsport Alloy Wheels x 4 in Black.". these are 17" but the question I'm asking is would it just be a straight swap with the tyres and stick them on or will there be any complications? I don't want to buy them and end up with aggro, rather wait
 
Theres a whole lot more to consider than just the size of the wheel. Offset, bore size etc etc etc.