money is tight for me also.I went with the AEM CAI even tho its a few more than some because its supposed to make more power.I wanted to be fairly quiet while not on it [the cai is loud as hell] and stay away from the fartcan noise so I went with the Apex-i world sport exhaust and am very happy.A DC JDM 4-1 header was only 230ish and for the money thats a great header.The best upgrade I made was shocks and springs,I went with Eibach Sportlines and KYB AGX[wanted tokiko's but the budget stepped in] riding on 13's w/sumitomo htr 200's [I have been very happy with these tires for the money] and even the power I have seemed more effective as well as being a blast to drive which is what I want out of this car anyways.
My next thing is cams and gears because I'm just past 30,000 and need a valve adj so its a perfect time to do them, still not sure on the cams but money will be the deciding factor so probably something I dont have to do the valvetrain,maybe CTR's.
I also pulled the power steering and never installed the AC,the PS mod was worth it and I plan on doing some lightining this summer also.
I have all the links for where I found the best deals as I am a very carful shopper and cheap so pm me if you want to know.
I will boost mine someday but will wait till 60,000 or so and go with a b18 or 20 block.
I do run studded winterfire's in the snow and the height has been a minor issue here in Iowa as some days the drifts are just too tall for my front end but in the summer most driveways and entrance's to parking lots dont give me much hassle so I'll stay with the sportlines but at first I was thinking about trading down to the pro-kit because it felt way low.I'm 6'2 230# and 32 years old so its kinda comical when people see me get out of this car but I'm having fun!!