Gruntles, most people change the whole strut out as you get a break upgrade and can also pick a shorter strut which is beneficial when lowering your car etc.
The 240k would have the biggest brakes but there are two types of 240k brakes so depends on what you have and if you want to lower your car etc as what strut and brake combo would suit you the best.
The 240K with the 253mm diameter rotor and twin piston sumitomo calipers can fit some 13" mags.
It does depend on the width and offset of the rim though as they are all made differently and some will clash with the caliper.
Have you seen this thread?
http://www.ozdat.com/forum/viewtopic.php?f=8&t=4361