I think it all comes down to why you came into this hobby in the first place. I came into this because I really had never gone all out on anything, Ive never really put down all my effort into one project until i was satisfied. But thats the thing about modifying cars. Its never supposed to end, unless your filthy, filthy rich. theres always going to be something new to buy, some new techinique, new style, new techniques.
Seriously, sit down and price out anything that you can think of to buy for your car. if youre serious, it should be well over 20k maybe 30k. then, plus if something breaks, you have to replace it. thats why it P(#@$ me off when i see underbody glow kits, and APC stickers. because the people who buy these items seriously think that there is some kind of recognition for owning things like that.
Also, i dont believe that it is neccesarily "all or nothing." I think that you should do everything that you possibly can for what youre going to use the car for, Drifting, Drag Racing, Road Racing, Auto Crossing. etc... for all the ricers out there, believe it or not, there are more things to purchase than muffler tips, shift knobs and other shiny perephanalia.

all i can say is thank god that nissan guys are rad(at least the ones ive talked to here), and not @#!($ like honda guys(that i know). Im glad that they stopped making the beloved 240sx 5 years ago, can you imagine if they had a 2003 model 240sx that had a factory performance package of exterior badges and spoilers??
I cant imagine buying a car that had already been modified. because its not your work, I dont care haw fast it is. theres very little pride in that. you have to put your own work into it for it to be truly yours. And i think that an upgraded exhaust is a fine thing to purchase and have, but only if you plan on doing other mods. its be pretty silly to see an sr20det flowing through a stock exhaust wouldn't it??
as long as you do things right the first time, no half-***, no cheap parts. then youre ok in my book (if that counts for something).
and please, !@#$)@)(!@$ dont rice out nissans, its pains us all.(sorry its so long):D