What size of front ARB have you gone for?
There are two R32 ones, 1 x 21mm at about £80 for the full kit, 1 x 23mm at about £100 for the full kit.
Make sure you have the right one coming.
As above with the strutt brace, the S3 one from Audi (about £50) is good enough.
If you have a bunch of money sitting about I would have gone about spending it in a different way.
Coming from your previous car you should be concentrating on getting the handling sorted before you have more power as you will be really dissappointed in this.
Also in a 2003 motor the engine mounts, suspension and suspension bushes will be pretty tired. Upgrade these items and your car will feel like new again.
The OEM brakes are very good but choosing the correct pads, discs and fluid will make a big difference too.
With your OEM turbo your only going to see 280BHP max. If you like a fast car then start looking into bigger turbo's like the GT2871R which will give you a healthy 350BHP and about the same in torque before you need to be thinking about changing your OEM rods.
The FMIC you have chosen is the bigger version of the 350BHP rated LCR one. TBH I wouldn't have gone for this one if I were you unless your going for BT's.