Why? I've been running standard S14 brakes on my 180 for the last 8 years and abuse the absolute hell out of it on track - including sub 9 minute laps of the Ring. The only 2 times I've ever experienced brake fade have been when I forgot to change the fluid for 2 years running and it got contaminated ( ) and at Anglesea when I was caught behind a group of MX5's that were permanently on and off of their brakes all lap and didn't make it overly easy to get past. Driven properly the standard brake setup (with decent pads and fluid) is all you really need for trackdays.
I'm only going to start looking for bigger brakes if I ever get the cash together for my long hoped for upgrade to about 350Bhp.
Additionally my S14a had 300Bhp by the time I sold it and was still on Stock Nissan disks, calipers & pads with no issues....
Sensible upgrades for a nice track/fast road car would be S-Tunes and a better Radiator IMO. ARB's would dial out the body roll if it bothers you but be carefull of coilovers, I found most of the cheaper stuff too stiff to be much use on the average country road and ruin the comfort of the car if you wanted to use it for a long trip somewhere.
If you start upping the power do it right and don't scrimp or it'll get expensive fast
While I agree there are better car's for track use if you specifically want a 200 then just do it
Thinking about it the worst thing about getting a 200 around the track is keepping it quiet if you've started tuning it