On the topic of 'the occasional track day'...
I've had customers tell me a million times, "I'm going to do the occasional track day, so I don't need anything too over the top."
There is no such thing as 'the occasional track day' with regards to brakes. Either you
will take your brakes on the track, and they
will see the extreme temperatures that occur on the track...or you will
not take your brakes on the track. Either your brakes will have the capacity/capability to deal with tnose track temperatures, or they will not. That holds true, regardless of whether or not you plan to visit the track 20 times a year or once a year.
If you don't have the right brake setup (pads, fluid, or even a brake kit), you will likely have brake-related issues, and it will potentially ruin your day...whether it's your first track day, or your 14th. It does not matter. Brakes are one of those situations where you prepare for the worst, and reap the benefits by enjoying your time at the track. The alternative is to go light, then spend your track time ending sessions early, crawling around under the car, bleeding brakes, missing sessions, and cursing up a storm.
Sorry...had to get that one off my chest.