some decent tires and 300zx brakes (even 26mm) will be beyond most here's needs.
I think the best bang for buck is whatever the best tire you can afford is (and afford to replace every 10k or so
), some KTS/Stance coilovers, and 300ZX brakes (just the fronts if budget)...slap on some HPS or equivalent street pads and call it a day and go drive. If you are finding these pads are letting you down...move up.
I went with R33 GTST brakes...it's going to suck come rotor time in front as the 30mmx296mm rotors aren't as popular. I was supposed to be sent GTR brakes but the asshole screwed me. Fortunately it was a fair price still, but there was other problems. Running HPS 300zx pads. With doing all four corners I picked up a 16/15 MBC for ebay and some ATE fluid. SPL for lines. Used the R33 GTST ebrake cables for a direct fit on my S14 (just transfer your stock brackets over).
I went with KTS Beta's from SPL Parts and they are a very good street coilover even outside of cost, can handle track very adequately. They are not Ohlins by any means, but they are a fraction of the price.
I am rolling on Goodyear Assymetrics now, got them on a killer sale. Great tires esp now with rain everyday.
I don't think I need more than the above unless I was tracking the car regularly...then I'd just pick up an extra set of pads, some racing tires/cheap wheels and leave it at that. Probably be a few years before I was better than the car.